On Mon, 02 Feb 2009 18:29:04 -0800, Jeroen van Aart <[email protected]> wrote:
>
> Mina Azer wrote:
> > can anybody please map the mail flow on all three port 25, 587, 465
>
> I let ASSP listen on port 25 for regular email transfer, and port 26
> (local IP 127.0.0.1) for relaying. And the MTA (Exim in this case) is
> listening on ports 465 and 587 for email submissions and 24 (local IP
> 127.0.0.1) for relaying.
>
> A user can submit email only on port 465 or 587 of the MTA and the MTA
> will submit it to ASSP on port 26 (mostly to take care of whitelisting),
> then after processing ASSP will submit all email received on port 26 to
> the MTA's local IP (127.0.0.1) on port 24. The MTA has been configured
> to send out all emails it receives on port 24 as normal.
>
> When ASSP receives email on port 25 it will submit it to the MTA on port
> 24 (local IP 127.0.0.1) then the MTA will deal with it.
>
> So in ASSP it is configured like this:
> SMTP Listen Port 25
> SMTP Destination 127.0.0.1:24
> Relay Host 127.0.0.1:24
> Relay Port 127.0.0.1:26
>
> The MTA and ASSP are on the same server. The MTA can either send
> incoming email to another MTA which servers as the mailstore
> (imap/pop3), or the mailstore can be on the same server. That just
> depends on how many servers you want to involve. At home I have it all
> on 1 server (including imap, bind, webmail and what have you), at other
> occasions I configured, say, 3 ASSP/MTA servers and 1 mailstore with an
> MTA/Imap/pop3 etc.
>
> Best regards,
> Jeroen
>
>
Using 1.5.1.0 rc2 with SSL support, a simpler configuration is possible.
ASSP listens on 25, 465 and 587.
MTA listens on 225 and 226.
ASSP's 25 and 465 are sent to the MTA's 225. AUTH is optional here.
ASSP's 587 is sent to the MTA's 226. AUTH is required in this flow.
This gives you:
25 - ASSP, SSL optional, AUTH optional - 225 - MTA
465 - ASSP, SSL mandatory, AUTH optional - 225 - MTA
587 - ASSP, SSL optional, AUTH mandatory - 226 - MTA
Regards,
-jr
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