Allowed domains and not allowed to use this list messages

Question

imsimta version
Sun Java(tm) System Messaging Server 6.3-3.01 (built Jul 12 2007; 32bit)
libimta.so 6.3-3.01 (built 20:10:10, Jul 12 2007; 32bit)
SunOS mars 5.10 Generic_125100-08 sun4u sparc SUNW,Sun-Fire-V240
We have a group account that we use for support. We have used the Delegated Administrator to limit which domains can send to the list by setting "Allowed Domains:" to the form "*.our.domain" on that list.
We are now getting thousands of the spam to "postmaster" saying that saying the message could not be delivered because "Reason: you are not allowed to use this list:". We have successfully kept a lot of spam from going to that group mailing list, but we as postmasters would like to not receive all those messages telling spammers that they can't send to the list. Is there a way to turn off those "not allowed to use this list" messages to postmaster for the group list?
Hal Huntley

Answer 1

halsri wrote:
We have a group account that we use for support. We have used the Delegated Administrator to limit which domains can send to the list by setting "Allowed Domains:" to the form "*.our.domain" on that list.
We are now getting thousands of the spam to "postmaster" saying that saying the message could not be delivered because "Reason: you are not allowed to use this list:". We have successfully kept a lot of spam from going to that group mailing list, but we as postmasters would like to not receive all those messages telling spammers that they can't send to the list. Is there a way to turn off those "not allowed to use this list" messages to postmaster for the group list?There appears to be two issues here:
1. The postmaster address is getting a copy of the bounce emails.
2. The mailing list is not rejecting the email at the SMTP level, rather it is creating a DSN bounce email.
Whether the postmaster gets a copy of bounce emails is controlled by the various warnpost, sendpost etc. imta.cnf channel configuration parameters. More information on turning these off here:
http://msg.wikidoc.info/index.php/Turn_Off_Postmaster_Notifications
For the second issue, if a mailing list has the "maildeferprocessing" attribute set to "yes" then the email will be accepted (without checking the allowed/disallowed recipients) and processed 'offline'. If the email is rejected during this processing then a bounce email is created.
As of Messaging Server 6.3 you can set mailDeferProcessing to "After_Auth" to cause group validation to be done immediately but group expansion to be deferred.
Setting mailDeferProcess to "no" causes the group expansion and validation to be performed before the email is accepted. The downside to this is that for a large mailing list that take a long time to expand, the email client could time out and the email not accepted.
Regards,
Shane.