Editing Sending Email with PHP on IIS (section)

=== Specifying the sender ===

The real hurtle I encountered was this error:
<syntaxhighlight lang="text">
warning: mail() [function.mail]: SMTP server response: 501 5.5.4 Invalid Address
</syntaxhighlight>
The problem is that by default SMTP on Windows doesn't accept emails in the format <code>From: John Doe <johndoe@domain.com></code> even though that format is RFC-compliant.

Something like this will fail on Windows (but work fine on *nix)
<syntaxhighlight lang="php">
$headers = "From: {$sender_name} <{$sender_email}>\r\n";
mail($to, $subject, $body, $headers);
</syntaxhighlight>
Whereas this will work:
<syntaxhighlight lang="php">
$headers = "From: {$sender_email}\r\n";
</syntaxhighlight>
Fix: edit <code>php.ini</code>:
<syntaxhighlight lang="text">
sendmail_from = me@domain.com
</syntaxhighlight>