[Mailman-Users] bounces

Barry Finkel b19141 at anl.gov
Wed May 5 14:37:57 CEST 2010

>In SMTP 4.y.z DSNs are "temporary" errors.  They could be caused by a 
>spam filter over loaded, or the system shutting down, or...
>> i'm assuming it's retried by the mta. the settings in mailman clearly 
>> state that it should be discarded right away...
>The 4.y.z should be seen as an invitation for the SMTP server to try 
>sending the message again at a later time.
>The MTA will eventually time out the message and generate a permanent error.

I assume that there will be a warning message sent back to the "sender"
after the mail has been queued for a few hours (we have in Postfix
"delay_warning_time = 8").  I assume that the warning message will
be sent to the list -bounces address, and that Mailman will process
this warning correctly.
Barry S. Finkel
Computing and Information Systems Division
Argonne National Laboratory          Phone:    +1 (630) 252-7277
9700 South Cass Avenue               Facsimile:+1 (630) 252-4601
Building 240, Room 5.B.8             Internet: BSFinkel at anl.gov
Argonne, IL   60439-4828             IBMMAIL:  I1004994

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