[Pkg-exim4-users] Configuring smarthost based on the network

[Nigel Metheringham]

On 10 Aug 2009, at 01:21, Norbert Preining wrote:

> Unfortunately sometimes the port 25 is blocked (even outgoing) in some
> networks and smtp sending can *only* be done via their mail router.

Blocking port 25 is absolutely best practice.
Your MUA or MSA (if you are using exim in this sort of config), should  
instead be connecting to the MSA port (587) using an authenticated  
(and probably encrypted) session.  587 should be universally allowed  
through.

If your mail provider does not provide an MSA service on 587 then they  
are incompetent.  Beat them until they do.

	Nigel.

--
[ Nigel Metheringham             Nigel.Metheringham at InTechnology.com ]
[ - Comments in this message are my own and not ITO opinion/policy - ]