Wednesday 06 December 2006 5:24:39 am
David, here's a bit of a long shot: are you trying to connect to an Exchange box via SMTP? I seem to remember that some Exchange machines don't like the EHLO command, and will at that point disconnect whatever client is trying to talk. The newsletter system should use HELO instead when sending email. Then again, I could be talking rubbish - I know very little about Exchange, but a reasonable amount about UNIX mail systems. Edit: I think actually what I'm talking about only happens if you have a Cisco PIX firewall with smtp_protocol_fixup enabled in the way, so that probably doesn't apply in your case. Never mind! Is there any way you could set up Ethereal or some other packet tracing program to see what's going on at the SMTP port? That might give a clearer idea. Or it might be overkill!
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