Mini Kabibi Habibi
<!DOCTYPE html>
<html lang="en" data-content_root="../">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
<meta property="og:title" content="email.errors: Exception and Defect classes" />
<meta property="og:type" content="website" />
<meta property="og:url" content="https://docs.python.org/3/library/email.errors.html" />
<meta property="og:site_name" content="Python documentation" />
<meta property="og:description" content="Source code: Lib/email/errors.py The following exception classes are defined in the email.errors module: Here is the list of the defects that the FeedParser can find while parsing messages. Note th..." />
<meta property="og:image" content="_static/og-image.png" />
<meta property="og:image:alt" content="Python documentation" />
<meta name="description" content="Source code: Lib/email/errors.py The following exception classes are defined in the email.errors module: Here is the list of the defects that the FeedParser can find while parsing messages. Note th..." />
<meta name="theme-color" content="#3776ab">
<meta property="og:image:width" content="200">
<meta property="og:image:height" content="200">
<title>email.errors: Exception and Defect classes — Python 3.14.0 documentation</title><meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=b86133f3" />
<link rel="stylesheet" type="text/css" href="../_static/classic.css?v=234b1a7c" />
<link rel="stylesheet" type="text/css" href="../_static/pydoctheme.css?v=8cd84f99" />
<link id="pygments_dark_css" media="(prefers-color-scheme: dark)" rel="stylesheet" type="text/css" href="../_static/pygments_dark.css?v=5349f25f" />
<script src="../_static/documentation_options.js?v=e4f4b189"></script>
<script src="../_static/doctools.js?v=9bcbadda"></script>
<script src="../_static/sphinx_highlight.js?v=dc90522c"></script>
<script src="../_static/sidebar.js"></script>
<link rel="search" type="application/opensearchdescription+xml"
title="Search within Python 3.14.0 documentation"
href="../_static/opensearch.xml"/>
<link rel="author" title="About these documents" href="../about.html" />
<link rel="index" title="Index" href="../genindex.html" />
<link rel="search" title="Search" href="../search.html" />
<link rel="copyright" title="Copyright" href="../copyright.html" />
<link rel="next" title="email.headerregistry: Custom Header Objects" href="email.headerregistry.html" />
<link rel="prev" title="email.policy: Policy Objects" href="email.policy.html" />
<link rel="canonical" href="https://docs.python.org/3/library/email.errors.html">
<style>
@media only screen {
table.full-width-table {
width: 100%;
}
}
</style>
<link rel="stylesheet" href="../_static/pydoctheme_dark.css" media="(prefers-color-scheme: dark)" id="pydoctheme_dark_css">
<link rel="shortcut icon" type="image/png" href="../_static/py.svg">
<script type="text/javascript" src="../_static/copybutton.js"></script>
<script type="text/javascript" src="../_static/menu.js"></script>
<script type="text/javascript" src="../_static/search-focus.js"></script>
<script type="text/javascript" src="../_static/themetoggle.js"></script>
<script type="text/javascript" src="../_static/rtd_switcher.js"></script>
<meta name="readthedocs-addons-api-version" content="1">
</head>
<body>
<div class="mobile-nav">
<input type="checkbox" id="menuToggler" class="toggler__input" aria-controls="navigation"
aria-pressed="false" aria-expanded="false" role="button" aria-label="Menu">
<nav class="nav-content" role="navigation">
<label for="menuToggler" class="toggler__label">
<span></span>
</label>
<span class="nav-items-wrapper">
<a href="https://www.python.org/" class="nav-logo">
<img src="../_static/py.svg" alt="Python logo">
</a>
<span class="version_switcher_placeholder"></span>
<form role="search" class="search" action="../search.html" method="get">
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" class="search-icon">
<path fill-rule="nonzero" fill="currentColor" d="M15.5 14h-.79l-.28-.27a6.5 6.5 0 001.48-5.34c-.47-2.78-2.79-5-5.59-5.34a6.505 6.505 0 00-7.27 7.27c.34 2.8 2.56 5.12 5.34 5.59a6.5 6.5 0 005.34-1.48l.27.28v.79l4.25 4.25c.41.41 1.08.41 1.49 0 .41-.41.41-1.08 0-1.49L15.5 14zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"></path>
</svg>
<input placeholder="Quick search" aria-label="Quick search" type="search" name="q">
<input type="submit" value="Go">
</form>
</span>
</nav>
<div class="menu-wrapper">
<nav class="menu" role="navigation" aria-label="main navigation">
<div class="language_switcher_placeholder"></div>
<label class="theme-selector-label">
Theme
<select class="theme-selector" oninput="activateTheme(this.value)">
<option value="auto" selected>Auto</option>
<option value="light">Light</option>
<option value="dark">Dark</option>
</select>
</label>
<div>
<h4>Previous topic</h4>
<p class="topless"><a href="email.policy.html"
title="previous chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.policy</span></code>: Policy Objects</a></p>
</div>
<div>
<h4>Next topic</h4>
<p class="topless"><a href="email.headerregistry.html"
title="next chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.headerregistry</span></code>: Custom Header Objects</a></p>
</div>
<div role="note" aria-label="source link">
<h3>This page</h3>
<ul class="this-page-menu">
<li><a href="../bugs.html">Report a bug</a></li>
<li>
<a href="https://github.com/python/cpython/blob/main/Doc/library/email.errors.rst?plain=1"
rel="nofollow">Show source
</a>
</li>
</ul>
</div>
</nav>
</div>
</div>
<div class="related" role="navigation" aria-label="Related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="right" >
<a href="email.headerregistry.html" title="email.headerregistry: Custom Header Objects"
accesskey="N">next</a> |</li>
<li class="right" >
<a href="email.policy.html" title="email.policy: Policy Objects"
accesskey="P">previous</a> |</li>
<li><img src="../_static/py.svg" alt="Python logo" style="vertical-align: middle; margin-top: -1px"></li>
<li><a href="https://www.python.org/">Python</a> »</li>
<li class="switchers">
<div class="language_switcher_placeholder"></div>
<div class="version_switcher_placeholder"></div>
</li>
<li>
</li>
<li id="cpython-language-and-version">
<a href="../index.html">3.14.0 Documentation</a> »
</li>
<li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li>
<li class="nav-item nav-item-2"><a href="netdata.html" >Internet Data Handling</a> »</li>
<li class="nav-item nav-item-3"><a href="email.html" accesskey="U"><code class="xref py py-mod docutils literal notranslate"><span class="pre">email</span></code> — An email and MIME handling package</a> »</li>
<li class="nav-item nav-item-this"><a href=""><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.errors</span></code>: Exception and Defect classes</a></li>
<li class="right">
<div class="inline-search" role="search">
<form class="inline-search" action="../search.html" method="get">
<input placeholder="Quick search" aria-label="Quick search" type="search" name="q" id="search-box">
<input type="submit" value="Go">
</form>
</div>
|
</li>
<li class="right">
<label class="theme-selector-label">
Theme
<select class="theme-selector" oninput="activateTheme(this.value)">
<option value="auto" selected>Auto</option>
<option value="light">Light</option>
<option value="dark">Dark</option>
</select>
</label> |</li>
</ul>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<section id="module-email.errors">
<span id="email-errors-exception-and-defect-classes"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.errors</span></code>: Exception and Defect classes<a class="headerlink" href="#module-email.errors" title="Link to this heading">¶</a></h1>
<p><strong>Source code:</strong> <a class="extlink-source reference external" href="https://github.com/python/cpython/tree/3.14/Lib/email/errors.py">Lib/email/errors.py</a></p>
<hr class="docutils" />
<p>The following exception classes are defined in the <a class="reference internal" href="#module-email.errors" title="email.errors: The exception classes used by the email package."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.errors</span></code></a> module:</p>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MessageError">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MessageError</span></span><a class="headerlink" href="#email.errors.MessageError" title="Link to this definition">¶</a></dt>
<dd><p>This is the base class for all exceptions that the <a class="reference internal" href="email.html#module-email" title="email: Package supporting the parsing, manipulating, and generating email messages."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email</span></code></a> package can
raise. It is derived from the standard <a class="reference internal" href="exceptions.html#Exception" title="Exception"><code class="xref py py-exc docutils literal notranslate"><span class="pre">Exception</span></code></a> class and defines no
additional methods.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MessageParseError">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MessageParseError</span></span><a class="headerlink" href="#email.errors.MessageParseError" title="Link to this definition">¶</a></dt>
<dd><p>This is the base class for exceptions raised by the
<a class="reference internal" href="email.parser.html#email.parser.Parser" title="email.parser.Parser"><code class="xref py py-class docutils literal notranslate"><span class="pre">Parser</span></code></a> class. It is derived from
<a class="reference internal" href="#email.errors.MessageError" title="email.errors.MessageError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageError</span></code></a>. This class is also used internally by the parser used
by <a class="reference internal" href="email.headerregistry.html#module-email.headerregistry" title="email.headerregistry: Automatic Parsing of headers based on the field name"><code class="xref py py-mod docutils literal notranslate"><span class="pre">headerregistry</span></code></a>.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.HeaderParseError">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">HeaderParseError</span></span><a class="headerlink" href="#email.errors.HeaderParseError" title="Link to this definition">¶</a></dt>
<dd><p>Raised under some error conditions when parsing the <span class="target" id="index-0"></span><a class="rfc reference external" href="https://datatracker.ietf.org/doc/html/rfc5322.html"><strong>RFC 5322</strong></a> headers of a
message, this class is derived from <a class="reference internal" href="#email.errors.MessageParseError" title="email.errors.MessageParseError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageParseError</span></code></a>. The
<a class="reference internal" href="email.message.html#email.message.EmailMessage.set_boundary" title="email.message.EmailMessage.set_boundary"><code class="xref py py-meth docutils literal notranslate"><span class="pre">set_boundary()</span></code></a> method will raise this
error if the content type is unknown when the method is called.
<a class="reference internal" href="email.header.html#email.header.Header" title="email.header.Header"><code class="xref py py-class docutils literal notranslate"><span class="pre">Header</span></code></a> may raise this error for certain base64
decoding errors, and when an attempt is made to create a header that appears
to contain an embedded header (that is, there is what is supposed to be a
continuation line that has no leading whitespace and looks like a header).</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.BoundaryError">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">BoundaryError</span></span><a class="headerlink" href="#email.errors.BoundaryError" title="Link to this definition">¶</a></dt>
<dd><p>Deprecated and no longer used.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MultipartConversionError">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MultipartConversionError</span></span><a class="headerlink" href="#email.errors.MultipartConversionError" title="Link to this definition">¶</a></dt>
<dd><p>Raised if the <a class="reference internal" href="email.compat32-message.html#email.message.Message.attach" title="email.message.Message.attach"><code class="xref py py-meth docutils literal notranslate"><span class="pre">attach()</span></code></a> method is called
on an instance of a class derived from
<a class="reference internal" href="email.mime.html#email.mime.nonmultipart.MIMENonMultipart" title="email.mime.nonmultipart.MIMENonMultipart"><code class="xref py py-class docutils literal notranslate"><span class="pre">MIMENonMultipart</span></code></a> (e.g.
<a class="reference internal" href="email.mime.html#email.mime.image.MIMEImage" title="email.mime.image.MIMEImage"><code class="xref py py-class docutils literal notranslate"><span class="pre">MIMEImage</span></code></a>).
<a class="reference internal" href="#email.errors.MultipartConversionError" title="email.errors.MultipartConversionError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MultipartConversionError</span></code></a> multiply
inherits from <a class="reference internal" href="#email.errors.MessageError" title="email.errors.MessageError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageError</span></code></a> and the built-in <a class="reference internal" href="exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a>.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.HeaderWriteError">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">HeaderWriteError</span></span><a class="headerlink" href="#email.errors.HeaderWriteError" title="Link to this definition">¶</a></dt>
<dd><p>Raised when an error occurs when the <a class="reference internal" href="email.generator.html#module-email.generator" title="email.generator: Generate flat text email messages from a message structure."><code class="xref py py-mod docutils literal notranslate"><span class="pre">generator</span></code></a> outputs
headers.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MessageDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MessageDefect</span></span><a class="headerlink" href="#email.errors.MessageDefect" title="Link to this definition">¶</a></dt>
<dd><p>This is the base class for all defects found when parsing email messages.
It is derived from <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a>.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.HeaderDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">HeaderDefect</span></span><a class="headerlink" href="#email.errors.HeaderDefect" title="Link to this definition">¶</a></dt>
<dd><p>This is the base class for all defects found when parsing email headers.
It is derived from <a class="reference internal" href="#email.errors.MessageDefect" title="email.errors.MessageDefect"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageDefect</span></code></a>.</p>
</dd></dl>
<p>Here is the list of the defects that the <a class="reference internal" href="email.parser.html#email.parser.FeedParser" title="email.parser.FeedParser"><code class="xref py py-class docutils literal notranslate"><span class="pre">FeedParser</span></code></a>
can find while parsing messages. Note that the defects are added to the message
where the problem was found, so for example, if a message nested inside a
<em class="mimetype">multipart/alternative</em> had a malformed header, that nested message
object would have a defect, but the containing messages would not.</p>
<p>All defect classes are subclassed from <a class="reference internal" href="#email.errors.MessageDefect" title="email.errors.MessageDefect"><code class="xref py py-class docutils literal notranslate"><span class="pre">email.errors.MessageDefect</span></code></a>.</p>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.NoBoundaryInMultipartDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">NoBoundaryInMultipartDefect</span></span><a class="headerlink" href="#email.errors.NoBoundaryInMultipartDefect" title="Link to this definition">¶</a></dt>
<dd><p>A message claimed to be a multipart, but had no <em class="mimetype">boundary</em>
parameter.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.StartBoundaryNotFoundDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">StartBoundaryNotFoundDefect</span></span><a class="headerlink" href="#email.errors.StartBoundaryNotFoundDefect" title="Link to this definition">¶</a></dt>
<dd><p>The start boundary claimed in the <em class="mailheader">Content-Type</em> header was
never found.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.CloseBoundaryNotFoundDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">CloseBoundaryNotFoundDefect</span></span><a class="headerlink" href="#email.errors.CloseBoundaryNotFoundDefect" title="Link to this definition">¶</a></dt>
<dd><p>A start boundary was found, but no corresponding close boundary was ever
found.</p>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.3.</span></p>
</div>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.FirstHeaderLineIsContinuationDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">FirstHeaderLineIsContinuationDefect</span></span><a class="headerlink" href="#email.errors.FirstHeaderLineIsContinuationDefect" title="Link to this definition">¶</a></dt>
<dd><p>The message had a continuation line as its first header line.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MisplacedEnvelopeHeaderDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MisplacedEnvelopeHeaderDefect</span></span><a class="headerlink" href="#email.errors.MisplacedEnvelopeHeaderDefect" title="Link to this definition">¶</a></dt>
<dd><p>A “Unix From” header was found in the middle of a header block.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MissingHeaderBodySeparatorDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MissingHeaderBodySeparatorDefect</span></span><a class="headerlink" href="#email.errors.MissingHeaderBodySeparatorDefect" title="Link to this definition">¶</a></dt>
<dd><p>A line was found while parsing headers that had no leading white space but
contained no ‘:’. Parsing continues assuming that the line represents the
first line of the body.</p>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.3.</span></p>
</div>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MalformedHeaderDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MalformedHeaderDefect</span></span><a class="headerlink" href="#email.errors.MalformedHeaderDefect" title="Link to this definition">¶</a></dt>
<dd><p>A header was found that was missing a colon, or was otherwise malformed.</p>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.3: </span>This defect has not been used for several Python versions.</p>
</div>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.MultipartInvariantViolationDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">MultipartInvariantViolationDefect</span></span><a class="headerlink" href="#email.errors.MultipartInvariantViolationDefect" title="Link to this definition">¶</a></dt>
<dd><p>A message claimed to be a <em class="mimetype">multipart</em>, but no subparts were found.
Note that when a message has this defect, its
<a class="reference internal" href="email.compat32-message.html#email.message.Message.is_multipart" title="email.message.Message.is_multipart"><code class="xref py py-meth docutils literal notranslate"><span class="pre">is_multipart()</span></code></a> method may return <code class="docutils literal notranslate"><span class="pre">False</span></code>
even though its content type claims to be <em class="mimetype">multipart</em>.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.InvalidBase64PaddingDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">InvalidBase64PaddingDefect</span></span><a class="headerlink" href="#email.errors.InvalidBase64PaddingDefect" title="Link to this definition">¶</a></dt>
<dd><p>When decoding a block of base64 encoded bytes, the padding was not correct.
Enough padding is added to perform the decode, but the resulting decoded
bytes may be invalid.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.InvalidBase64CharactersDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">InvalidBase64CharactersDefect</span></span><a class="headerlink" href="#email.errors.InvalidBase64CharactersDefect" title="Link to this definition">¶</a></dt>
<dd><p>When decoding a block of base64 encoded bytes, characters outside the base64
alphabet were encountered. The characters are ignored, but the resulting
decoded bytes may be invalid.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.InvalidBase64LengthDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">InvalidBase64LengthDefect</span></span><a class="headerlink" href="#email.errors.InvalidBase64LengthDefect" title="Link to this definition">¶</a></dt>
<dd><p>When decoding a block of base64 encoded bytes, the number of non-padding
base64 characters was invalid (1 more than a multiple of 4). The encoded
block was kept as-is.</p>
</dd></dl>
<dl class="py exception">
<dt class="sig sig-object py" id="email.errors.InvalidDateDefect">
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">email.errors.</span></span><span class="sig-name descname"><span class="pre">InvalidDateDefect</span></span><a class="headerlink" href="#email.errors.InvalidDateDefect" title="Link to this definition">¶</a></dt>
<dd><p>When decoding an invalid or unparsable date field. The original value is
kept as-is.</p>
</dd></dl>
</section>
<div class="clearer"></div>
</div>
</div>
</div>
<div class="sphinxsidebar" role="navigation" aria-label="Main">
<div class="sphinxsidebarwrapper">
<div>
<h4>Previous topic</h4>
<p class="topless"><a href="email.policy.html"
title="previous chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.policy</span></code>: Policy Objects</a></p>
</div>
<div>
<h4>Next topic</h4>
<p class="topless"><a href="email.headerregistry.html"
title="next chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.headerregistry</span></code>: Custom Header Objects</a></p>
</div>
<div role="note" aria-label="source link">
<h3>This page</h3>
<ul class="this-page-menu">
<li><a href="../bugs.html">Report a bug</a></li>
<li>
<a href="https://github.com/python/cpython/blob/main/Doc/library/email.errors.rst?plain=1"
rel="nofollow">Show source
</a>
</li>
</ul>
</div>
</div>
<div id="sidebarbutton" title="Collapse sidebar">
<span>«</span>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related" role="navigation" aria-label="Related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="right" >
<a href="email.headerregistry.html" title="email.headerregistry: Custom Header Objects"
>next</a> |</li>
<li class="right" >
<a href="email.policy.html" title="email.policy: Policy Objects"
>previous</a> |</li>
<li><img src="../_static/py.svg" alt="Python logo" style="vertical-align: middle; margin-top: -1px"></li>
<li><a href="https://www.python.org/">Python</a> »</li>
<li class="switchers">
<div class="language_switcher_placeholder"></div>
<div class="version_switcher_placeholder"></div>
</li>
<li>
</li>
<li id="cpython-language-and-version">
<a href="../index.html">3.14.0 Documentation</a> »
</li>
<li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li>
<li class="nav-item nav-item-2"><a href="netdata.html" >Internet Data Handling</a> »</li>
<li class="nav-item nav-item-3"><a href="email.html" ><code class="xref py py-mod docutils literal notranslate"><span class="pre">email</span></code> — An email and MIME handling package</a> »</li>
<li class="nav-item nav-item-this"><a href=""><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.errors</span></code>: Exception and Defect classes</a></li>
<li class="right">
<div class="inline-search" role="search">
<form class="inline-search" action="../search.html" method="get">
<input placeholder="Quick search" aria-label="Quick search" type="search" name="q" id="search-box">
<input type="submit" value="Go">
</form>
</div>
|
</li>
<li class="right">
<label class="theme-selector-label">
Theme
<select class="theme-selector" oninput="activateTheme(this.value)">
<option value="auto" selected>Auto</option>
<option value="light">Light</option>
<option value="dark">Dark</option>
</select>
</label> |</li>
</ul>
</div>
<div class="footer">
© <a href="../copyright.html">Copyright</a> 2001 Python Software Foundation.
<br>
This page is licensed under the Python Software Foundation License Version 2.
<br>
Examples, recipes, and other code in the documentation are additionally licensed under the Zero Clause BSD License.
<br>
See <a href="/license.html">History and License</a> for more information.<br>
<br>
The Python Software Foundation is a non-profit corporation.
<a href="https://www.python.org/psf/donations/">Please donate.</a>
<br>
<br>
Last updated on Oct 07, 2025 (10:02 UTC).
<a href="/bugs.html">Found a bug</a>?
<br>
Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 8.2.3.
</div>
</body>
</html>