Mailing list problems - who can we contact



I have been having problems mailing to this list for a few months.
At present I can send mail to this list only by bypassing the
corporate server. 

Our IT people have started investigating, and ask ...

Do you have alternate contact details for the Maxima mailing list 
administrators? It seems that connections to the list gateway from 
our 2 internet mail gateways just times out. Connections from half 
the other networks we have tried also time out. The other half seem 
to work. Our service provider suspects an "odd" configuration of a 
router or the mail list mail host at their end.