[Mailman-Users] no bounce message with bad address

[Stephen J. Turnbull]

Loren Engrav via Mailman-Users writes:

 > sometimes I load an invalid address (invalid name but valid domain)
 > like xyz at whidbey.com; whidbey.com is ok but there is no xyz
 > 
 > with Mailman 2.1.26 at site5.com and 2.1.29 at mailmanlists.net
 > I do not receive a bounce message

Some sites refuse to send bounces on those because it could be a
spammer probing for valid addresses.  That's quite unusual as far as I
know.  It could be one of those sites that sends garbage bounces that
are not recognized by Mailman, in which case it should be sent to the
list owner or the site admin list mailman at list.example.com.  Have you
checked those mailboxes?  Other than that, not sure.

Steve