[Mailman-Users] Mailman cannot send messages to other hosts

[Tomas Vinar]

For some reason mailman cannot send messages to other hosts. Here is a
extract from log file:

Sep 19 14:46:40 2000 TrySMTPDelivery: To tvinar at math.uwaterloo.ca:
Sep 19 14:46:40 2000 TrySMTPDelivery:
Mailman.pythonlib.smtplib.SMTPRecipient
sRefused  / {'tvinar at math.uwaterloo.ca': (550, 'relaying to <tvinar at math.uwaterl
oo.ca> prohibited by administrator')}  (dequeued)

Any ideas what to change and where?

Tomas
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Tomas Vinar, University of Waterloo graduate student
E-mail:	    tvinar at math.uwaterloo.ca
Office:     DC2304, (519)888-4567 ext. 5390               
Home phone: (519)746-7632