Re: Blocking port 25 outbound

[Orlando Richards <orlando.richards () ED AC UK>]

> I can see why ISPs would do that (commercial site) but I can't see a good 
> reason for a university to do that. Why not train your sysadmins how to 
> configure an email server correctly or provide some tools to do so?
 
Part of the problem is that much of the spam is caused by viruses and bots
running their own SMTP engines and sending out emails themselves. Such
infestations are rarely administered by the university sysadmins. This is
precisely the reason we also blocked outbound port 25 traffic except from
our mail server. We also monitor the mail server for any more intelligent
malware that relays through the user-configured SMTP server.

--
Orlando.