TLS connection reuse is being used. About 10% of the connections are
reused for large volume ISPs. Small volume ISPs do not see connection
reuse. I believe this is as expected.
I did some testing of our DNS setup. A DNS query using dig is less
than 20 msec for both our primary and secondary dns
TLS connections are being reused about 10% of the time for larger ISPs.
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We have been running without TLS for many years. Some of the ISPs are
beginning to complain about not sending mail using TLS. We enabled
outbound smtp as a result. Postfix receives email only from our
private network -- we do not use inbound smtpd_tls as a result.
Our main.cf contains:
sm
