[Pkg-exim4-users] Multiple ports and enforcing authentication on just the non-standard one.

[Neil Briscoe]

Flushed with success on getting the additional router working precisely 
the way I wanted it - thanks to a couple of people's help here - what 
I'm looking to do next is get our MTA listening on a non-standard port 
as well as port 25.

Well, I know how to do that bit.

I do need to go and read up the README.Debian file on authentication - I 
know that gets a bit difficult.  What I need to know is whether the 
relevant chapter in there will tell me how to enforce authentication on 
the non-standard port - whilst not enforcing it on the standard SMTP port.

Why do I want to do this?  Well, two of our senior management are on 
Wanadoo UK who capture all port 25 traffic and force it through their 
server - so no matter what the management put in their SMTP settings 
(assuming standard port 25) it doesn't go through the server they 
specify, but through Wanadoo's server.

Secondly, it seems the Wanadoo UK servers have got themselves onto 
Sorbs' DNSBL blacklist - which upsets at least two separate anti-spam 
systems - including ours - I've had to add a couple of rules to get 
around that.

Be nice if I could offer them a solution whereby they could relay via us 
- but I don't want the whole of Wanadoo able to do that - hence the need 
for authentication on the non-standard port, but leave it turned off on 
port 25.

Any additional clues over what README.Debian will tell me gratefully 
accepted.

TIA

Regards
Neil


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