[exim] Final Solution

Firstly thank you to all the excellent people on this list who have
proffered very useful advice over the last few days. I thought I would
post our solution to the AOL grabbing port 25 traffic problem.

We decided in the end to run two exim daemons, one listening on ports 25
and 587 supporting normal authenticated smtp over ssl. On campus systems
use port 25, off campus (none Outlook Express) users use port 587 so
avoiding any ISP that snaffles port 25.

The second daemon is started with the

daemon exim -bd -q15m -tls-on-connect -C /usr/local/exim/configure-AOL

command. The configure-AOL file tells it to listen on port 465 for
tls-on-connect traffic. All of campus user of OE are told to use port
465. This works fine and means all our off campus users are using
authenticated SMTP over ssl or SMTPS, and all are avoiding port 25 in
case their ISP eats it.

Now I would like to know if there are any off campus users still using
port 25, but have not found a way of putting this into the log, so if
anybody has any suggestions on that front I would be very grateful.

Once again thanks for all the input.

Ron

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Ron McKeating
Senior IT Services Specialist
Internet Services and Software Solutions
Loughborough University
01509 222329