> On Jan 13, 2016, at 8:52 PM, Curtis Villamizar <cur...@orleans.occnc.com>
> wrote:
>
> The logs revealed something about the nature of the problem. A few of
> these sort of messages were found.
>
> Jan 13 17:08:22 mta3 postfix/smtpd[15958]:
> warning: TLS library problem:
> error:1408A0C1:SSL
> routines:ssl3_get_client_hello:no shared cipher:s3_srvr.c:1411:
> Jan 13 17:08:22 mta3 postfix/smtpd[15958]:
> lost connection after STARTTLS
> from resqmta-po-05v.sys.comcast.net[2001:558:fe16:19:96:114:154:164]
Post the output of "postconf -n | grep tls".
Post the output of "openssl version -a"
Post a PCAP file of a single failed TLS handshake. I know the person
at comcast in charge of their email transport security. I can probably
get them to fix it once we nail down the problem, assuming it is not overly
aggressive settings on your end.
--
Viktor.
