[Exim] TLS problems on non-standard port

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Autor: Juri Tsibrovski
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A: exim-users
Assumpte: [Exim] TLS problems on non-standard port
Hello,

I'm trying to set up Exim to listen on both ports 25 and 8025, to
accommodate poor Earthlink customers with access to port 25 blocked, using

    local_interfaces = 0.0.0.0.25 : 0.0.0.0.8025


Unfortunately, I can't get SSL to work on port 8025 reliably for everybody -
some clients can't send their mail, and I get the following in server logs:

    2003-06-27 17:15:41 SMTP protocol violation: synchronization error (next
input sent too soon): rejected "<80>L^A^C^A" H=ip68-x-y-z.nv.nv.cox.net
[68.x.y.z]


Turning out synchronization enforcement with

    smtp_enforce_sync = false


is not doing much good, the errors disappear from logs, but the clients are
still unable to use SSL. There is some correlation with client software -
those using Outlook Express 6.0 seems to be totally out of luck, but some
Outlook XP clients send mail just fine. It seems that OE clients can not
even initiate SMTP - at least there is nothing in OE's Smtp.log file.
Typical OE error follows:

"Your server has unexpectedly terminated the connection. Possible causes for
this include server problems, network problems, or a long period of
inactivity. Account: 'mail', Server: 'mail', Protocol: SMTP, Port: 8025,
Secure(SSL): Yes, Error Number: 0x800CCC0F"

Has anybody out here used SSL with Exim on non-standard ports with better
success?

Exim version is 4.20, it was compiled with OpenSSL 0.9.7b.