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21 lines
908 B
HTML
21 lines
908 B
HTML
<header>SMTP server response on unknown hostname reject</header>
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<center><tt>unknown_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_unknown_hostname</tt> restriction rule that is:<br>
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<i>Access denied: Unknown client HELO hostname (without DNS A or MX record)</i><br>
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<br>
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Note that the postfix default value used for <tt>unknown_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 577 for example (another reason is that code 501 is
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also the postfix default value for other kind of errors), otherwise, do not change this unless
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you have a complete understanding of RFC 822.
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</p>
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<hr>
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