[Mailman-Users] bounces

[Grant Taylor]

kalin m wrote:
> so if it's not 5xx it's not a bad email?  i see dsn=4.0.0. that's not 
> enough?

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.



Grant. . . .