FAQ / General Debugging / Q0059
Q0059
Question
When my Outlook Express 6.0 client sends a STARTTLS command to begin a TLS session, Exim doesn't seem to receive it. The Outlook log shows this:
SMTP: 14:19:27 [tx] STARTTLS SMTP: 14:19:27 [rx] 500 Unsupported command.
but the Exim debugging output shows this:
SMTP<< EHLO xxxx SMTP>> 250-yyyy Hello xxxx [nnn.nnn.nnn.nnn] 250-SIZE 52428800 250-PIPELINING 250-AUTH CRAM-MD5 PLAIN LOGIN 250-STARTTLS 250 HELP SMTP<< QUIT
Answer
Turn off scanning of outgoing email in Norton Antivirus. If you aren't running Norton Antivirus, see if you are running some other kind of SMTP proxying, either on the client or on a firewall between the client and server. “Unsupported command” is not an Exim message.
FAQ / General Debugging / Q0059