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21 lines
892 B
HTML
21 lines
892 B
HTML
<header>SMTP server response on hostname reject</header>
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<center><tt>invalid_hostname_reject_code</tt></center>
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<hr>
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This parameter specifies the SMTP server response code when a client violates the
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<tt>reject_invalid_hostname</tt> anti-UCE restriction rule that is:<br>
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<i>Bad syntax for client HELO hostname (Not RFC compliant)</i><br>
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<br>
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Note that the postfix default value used for <tt>invalid_hostname_reject_code</tt> is
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code 501, and this code in 'standard RFC 822' should means 'Syntax error in parameters
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or arguments'.
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So with Postfix, a 501 status code does not reflect exactly the RFC822 explanation.<br>
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<p>
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To avoid confusion, you can change this to 574 for example (another reason is that code 501
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is also the postfix default value for other kind of errors), otherwise, do not change
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this unless you have a complete understanding of RFC 822.
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</p>
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<hr>
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