[Mailman-Users] mailman and email harvesters

[Matthew Clarkson]

We have switched half (about 15 so far) of our mailing lists from our 
majordomo server (with a hypermail based archiving system)  to our new 
mailman server.  I have just been notified by my boss that since the 
start of the switchover (3 weeks ago) he and a few other people have had 
a dramatic increase in spam based activity on their email accounts.  I 
checked to make sure my robots.txt on the webserver root was fine with 
the following entries

User-agent: *
Disallow: /pipermail/


Also, I verified that all my lists private_roster settings were set to 
List members.

Can anyone else think of, if it is mailman that is the culprit here, any 
settings or ways that email harvesters could grab email addresses from a 
mailman server?

--
Matthew Clarkson