11-05-2009 11:24 AM
HI
I have the following problem. I have activated TLS both for incoming and outgoing mails. Email sent from our domain to outside recipients works fine with TLS header. The problem is with incoming mails. Mails sent to our domain are received with no TLS header. Could it be the certificate that is not trusted? How can i verify it? Could it be the firewall that may be dropping incoming TLS connection?
11-06-2009 04:18 PM
that's a good possibility. check out my article on how cisco firewalls' ESMTP inspection or fixup will ruin many advanced smtp operations:
http://tinyurl.com/lrr3or
once you've ruled out the firewall, you can also double check your config steps for inbound TLS negotiation:
http://tinyurl.com/g2noq
you'll need to locate the mail_logs or an injection debug log for these connections to see what's happening:
http://tinyurl.com/gcoof
thanks!
andrew
11-09-2009 09:37 AM
Thanks,
Very helpful. It was the firewall inspections policy.
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