> When courier accepts the email and then recognises that this email address > is not held locally it will consult the dns itself, see that there is > another preferred MX record, and try to relay the email to that hostname. > Presumably that host is temporarily unavailable, so the email will just sit > in the mailq as usual until the primary MX is available again.
Unfortunately, if the main MX server has bofh rules (like mine does - a lot of them), but the secondary doesn't, the administrator of the secondary server will get all of the bounced messages, rather than the original sender (which is why my friend who secondaries the rest of my services told me to stop using him as a secondary MX - he refuses to "give in" to spammers by imposing manual bofh rules). This is one reason why spammers prefer to direct mail towards secondary MX servers rather than primary ones. -- Chris Petersen Programmer / Web Designer Silicon Mechanics: http://www.siliconmechanics.com/ Blade Servers: http://www.siliconmechanics.com/c292/blade-server.php 1U Servers: http://www.siliconmechanics.com/c272/1u-server.php ------------------------------------------------------- This SF.net email is sponsored by: Perforce Software. Perforce is the Fast Software Configuration Management System offering advanced branching capabilities and atomic changes on 50+ platforms. Free Eval! http://www.perforce.com/perforce/loadprog.html _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
