From: Garrison Hoffman (garrisoncodefix.net)
Date: Mon Jan 30 2006 - 15:33:12 CST

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I have set up postfix with smtp-auth, recently one user has complained
that Thunderbird fails with:

"Sending of message failed. An error occurred sending mail: Unable to
connect to SMTP server cobalt.codefix.net via STARTTLS since it doesn't
offer STARTTLS In EHLO response. Please verify that your Mail/News
account settings are correct and try again."

When I netcat/telnet to port 25 I see:

250-PIPELINING
250-SIZE 10240000
250-ETRN
250-STARTTLS
250 8BITMIME

Whereas he sees:

250-PIPELINING
250-SIZE 10240000
250-ETRN
250-XXXXXXXA
250 8BITMIME

I saw nothing in smtpd.c that indicates "250-XXXXXXXA" to be a valid
postfix response, so my thinking is that perhaps some proxy or other
network filter on his end is interfering.

Can anyone shed some light on this?

There are no warnings in my maillog other than "address not listed for
hostname"

# postconf -n|grep tls
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/courier-imap/imapd.pem
smtpd_tls_loglevel = 0
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom

--
__________________________________________________________________
 Garrison Hoffman Codefix Consulting 1.718.210.3445
 garrisoncodefix.net http://codefix.net/ 1.866.456.0584

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