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        Class&nbsp;IS_EMAIL
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class IS_EMAIL</h1><span class="codelink"><a href="web2py.gluon.validators-pysrc.html#IS_EMAIL">source&nbsp;code</a></span><br /><br />
<pre class="base-tree">
object --+    
         |    
 <a href="web2py.gluon.validators.Validator-class.html">Validator</a> --+
             |
            <strong class="uidshort">IS_EMAIL</strong>
</pre>

<hr />
<pre class="literalblock">

Checks if field's value is a valid email address. Can be set to disallow
or force addresses from certain domain(s).

Email regex adapted from
http://haacked.com/archive/2007/08/21/i-knew-how-to-validate-an-email-address-until-i.aspx,
generally following the RFCs, except that we disallow quoted strings
and permit underscores and leading numerics in subdomain labels

Arguments:

- banned: regex text for disallowed address domains
- forced: regex text for required address domains

Both arguments can also be custom objects with a match(value) method.

Examples::

    #Check for valid email address:
    INPUT(_type='text', _name='name',
        requires=IS_EMAIL())

    #Check for valid email address that can't be from a .com domain:
    INPUT(_type='text', _name='name',
        requires=IS_EMAIL(banned='^.*\.com(|\..*)$'))

    #Check for valid email address that must be from a .edu domain:
    INPUT(_type='text', _name='name',
        requires=IS_EMAIL(forced='^.*\.edu(|\..*)$'))

    &gt;&gt;&gt; IS_EMAIL()('a@b.com')
    ('a@b.com', None)
    &gt;&gt;&gt; IS_EMAIL()('abc@def.com')
    ('abc@def.com', None)
    &gt;&gt;&gt; IS_EMAIL()('abc@3def.com')
    ('abc@3def.com', None)
    &gt;&gt;&gt; IS_EMAIL()('abc@def.us')
    ('abc@def.us', None)
    &gt;&gt;&gt; IS_EMAIL()('abc@d_-f.us')
    ('abc@d_-f.us', None)
    &gt;&gt;&gt; IS_EMAIL()('@def.com')           # missing name
    ('@def.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('&quot;abc@def&quot;.com')      # quoted name
    ('&quot;abc@def&quot;.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc+def.com')        # no @
    ('abc+def.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc@def.x')          # one-char TLD
    ('abc@def.x', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc@def.12')         # numeric TLD
    ('abc@def.12', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc@def..com')       # double-dot in domain
    ('abc@def..com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc@.def.com')       # dot starts domain
    ('abc@.def.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc@def.c_m')        # underscore in TLD
    ('abc@def.c_m', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('NotAnEmail')         # missing @
    ('NotAnEmail', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('abc@NotAnEmail')     # missing TLD
    ('abc@NotAnEmail', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('customer/department@example.com')
    ('customer/department@example.com', None)
    &gt;&gt;&gt; IS_EMAIL()('$A12345@example.com')
    ('$A12345@example.com', None)
    &gt;&gt;&gt; IS_EMAIL()('!def!xyz%abc@example.com')
    ('!def!xyz%abc@example.com', None)
    &gt;&gt;&gt; IS_EMAIL()('_Yosemite.Sam@example.com')
    ('_Yosemite.Sam@example.com', None)
    &gt;&gt;&gt; IS_EMAIL()('~@example.com')
    ('~@example.com', None)
    &gt;&gt;&gt; IS_EMAIL()('.wooly@example.com')       # dot starts name
    ('.wooly@example.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('wo..oly@example.com')      # adjacent dots in name
    ('wo..oly@example.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('pootietang.@example.com')  # dot ends name
    ('pootietang.@example.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('.@example.com')            # name is bare dot
    ('.@example.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('Ima.Fool@example.com')
    ('Ima.Fool@example.com', None)
    &gt;&gt;&gt; IS_EMAIL()('Ima Fool@example.com')     # space in name
    ('Ima Fool@example.com', 'enter a valid email address')
    &gt;&gt;&gt; IS_EMAIL()('localguy@localhost')       # localhost as domain
    ('localguy@localhost', None)

</pre><br /><br />

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    </td><td class="summary">
        <a href="web2py.gluon.validators.IS_EMAIL-class.html#regex" class="summary-name">regex</a> = <code title="re.compile(r'(?ix)^(?!\.)([-a-z0-9!#\$%&amp;\'\*\+/=\?\^_`\{\|\}~]|(?&lt;!\.)\
\.)+(?&lt;!\.)@(localhost|([a-z0-9]([-\w]*[a-z0-9])?\.)+[a-z]{2,})$')">re.compile(r'<code class="re-flags">(?ix)</code>^<code class="re-group">(?!</code>\.<code class="re-group">)</code><code class="re-group">(</code><code class="re-group">[</code>-a<code class="re-op">-</code>z0<code class="re-op">-</code>9!#\$%&amp;\'\*\+/=\?\^_`<code class="variable-ellipsis">...</code></code>
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    </td><td class="summary">
        <a href="web2py.gluon.validators.IS_EMAIL-class.html#regex_proposed_but_failed" class="summary-name">regex_proposed_but_failed</a> = <code title="re.compile(r'(?ix)^([\w!#\$%&amp;\'\*\+-/=\?\^`\{\|\}~]+\.)*[\w!#\$%&amp;\'\*\\
+-/=\?\^`\{\|\}~]+@((((([a-z0-9]{1}[a-z0-9-]{,62}[a-z0-9]{1})|[a-z])\.\
)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(:\d{1,5})?)$')">re.compile(r'<code class="re-flags">(?ix)</code>^<code class="re-group">(</code><code class="re-group">[</code>\w!#\$%&amp;\'\*\<code class="variable-ellipsis">...</code></code>
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<a name="__init__"></a>
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  <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">banned</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">forced</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">error_message</span>=<span class="sig-default"><code class="variable-quote">'</code><code class="variable-string">enter a valid email address</code><code class="variable-quote">'</code></span>)</span>
    <br /><em class="fname">(Constructor)</em>
  </h3>
  </td><td align="right" valign="top"
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  signature
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      object.__init__
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  <h3 class="epydoc">regex</h3>
  
  <dl class="fields">
  </dl>
  <dl class="fields">
    <dt>Value:</dt>
      <dd><table><tr><td><pre class="variable">
re.compile(r'<code class="re-flags">(?ix)</code>^<code class="re-group">(?!</code>\.<code class="re-group">)</code><code class="re-group">(</code><code class="re-group">[</code>-a<code class="re-op">-</code>z0<code class="re-op">-</code>9!#\$%&amp;\'\*\+/=\?\^_`\{\|\}~<code class="re-group">]</code><code class="re-op">|</code><code class="re-group">(?&lt;!</code>\.<code class="re-group">)</code><span class="variable-linewrap"><img src="crarr.png" alt="\" /></span>
\.<code class="re-group">)</code><code class="re-op">+</code><code class="re-group">(?&lt;!</code>\.<code class="re-group">)</code>@<code class="re-group">(</code>localhost<code class="re-op">|</code><code class="re-group">(</code><code class="re-group">[</code>a<code class="re-op">-</code>z0<code class="re-op">-</code>9<code class="re-group">]</code><code class="re-group">(</code><code class="re-group">[</code>-\w<code class="re-group">]</code><code class="re-op">*</code><code class="re-group">[</code>a<code class="re-op">-</code>z0<code class="re-op">-</code>9<code class="re-group">]</code><code class="re-group">)</code><code class="re-op">?</code>\.<code class="re-group">)</code><code class="re-op">+</code><code class="re-group">[</code>a<code class="re-op">-</code>z<code class="re-group">]</code><code class="re-op">{2,}</code><code class="re-group">)</code>$')
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  <h3 class="epydoc">regex_proposed_but_failed</h3>
  
  <dl class="fields">
  </dl>
  <dl class="fields">
    <dt>Value:</dt>
      <dd><table><tr><td><pre class="variable">
re.compile(r'<code class="re-flags">(?ix)</code>^<code class="re-group">(</code><code class="re-group">[</code>\w!#\$%&amp;\'\*\+-/=\?\^`\{\|\}~<code class="re-group">]</code><code class="re-op">+</code>\.<code class="re-group">)</code><code class="re-op">*</code><code class="re-group">[</code>\w!#\$%&amp;\'\*\<span class="variable-linewrap"><img src="crarr.png" alt="\" /></span>
+-/=\?\^`\{\|\}~<code class="re-group">]</code><code class="re-op">+</code>@<code class="re-group">(</code><code class="re-group">(</code><code class="re-group">(</code><code class="re-group">(</code><code class="re-group">(</code><code class="re-group">[</code>a<code class="re-op">-</code>z0<code class="re-op">-</code>9<code class="re-group">]</code><code class="re-op">{1}</code><code class="re-group">[</code>a<code class="re-op">-</code>z0<code class="re-op">-</code>9-<code class="re-group">]</code><code class="re-op">{,62}</code><code class="re-group">[</code>a<code class="re-op">-</code>z0<code class="re-op">-</code>9<code class="re-group">]</code><code class="re-op">{1}</code><code class="re-group">)</code><code class="re-op">|</code><code class="re-group">[</code>a<code class="re-op">-</code>z<code class="re-group">]</code><code class="re-group">)</code>\.<code class="re-group"></code><span class="variable-linewrap"><img src="crarr.png" alt="\" /></span>
<code class="re-group">)</code><code class="re-op">+</code><code class="re-group">[</code>a<code class="re-op">-</code>z<code class="re-group">]</code><code class="re-op">{2,6}</code><code class="re-group">)</code><code class="re-op">|</code><code class="re-group">(</code>\d<code class="re-op">{1,3}</code>\.<code class="re-group">)</code><code class="re-op">{3}</code>\d<code class="re-op">{1,3}</code><code class="re-group">(</code>:\d<code class="re-op">{1,5}</code><code class="re-group">)</code><code class="re-op">?</code><code class="re-group">)</code>$')
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