1424530229
- Added enhanced mail system status codes (RFC 1893/2034). - Added support for rejecting all mail unless client is authenticated (either as a relay client or with SMTP authentication) if $REQUIRE_AUTH is set. - Full domain names are now required in all addresses except for the null sender. - Removed the "bounce must have a single recipient" rule, as it is currently causing more problems (with address checkers) than it is solving (spammers no longer use this technique). - Fixed one-off bug in counting recipients for $MAXRCPTS. - Truncate UIDL responses to 70 characters as per RFC 1939. - Added QMQP and QMTP "reject" front ends, for completeness. The enhanced mail system status codes together with the $REQUIRE_AUTH change should make smtpfront compliant with RFC 2476's requirements for a "message submission agent", suitable for use on TCP port 587. |
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