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Bug #48798 FILTER_VALIDATE_EMAIL pass the illness email
Submitted: 2009-07-04 14:11 UTC Modified: 2009-07-04 16:06 UTC
From: yanleech at gmail dot com Assigned:
Status: Not a bug Package: Filter related
PHP Version: 5.2.10 OS: Ubuntu 9.04
Private report: No CVE-ID: None
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From: yanleech at gmail dot com
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 [2009-07-04 14:11 UTC] yanleech at gmail dot com 
Description:
------------
I do some filtering like:

filter_var($var, FILTER_VALIDATE_EMAIL);

and the email `blah@blah.com.` can be passed; and that must be a invalid email address cause no domain end with `.`(dot).

Reproduce code:
---------------
$var = 'blah@blah.com.';
echo (filter_var($var, FILTER_VALIDATE_EMAIL) === false) ? 'error':'passed';

Expected result:
----------------
error

Actual result:
--------------
passed

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 [2009-07-04 16:06 UTC] rasmus@php.net 
Trailing dots are perfectly valid in domain names.

Try these, for example:

http://www.php.net./
http://www.google.com./
http://www.yahoo.com./

Now, some mail servers may reject an email sent to an address with a trailing dot, but others have no problems with them.  We have no way of knowing which mail servers accept them.
 
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