The mailing list for listmasters using Sympa

[Ingvarr Zhmakin <address@concealed>]

I have some mailing list. It has subscribers.
One subscriber was user1a@domain, where `user1a' is alias of user
`user1'.
When `user1' tried to send a message from address `user1@domain', the
system began infinite loop of rejection notification messages from
sympa@domain.
When I noticed this there was already over 1000 messages.
As I changed subscriber base, the process stopped.

Perhaps the bug is somewhere at mailserver side, but if not it is
important enough to be discussed here.

                   Ingvarr.