I have a client reporting that mail sent from Zope using a MS Exchange box as their Zope Mail Host never arrives. The forms themselves are known not to be at fault since we have previously tested them using a Zope Mail Host defined on a unix box (running QMail). I can test the forms from remote as an end user and they seem to submit properly - so the mail host is accepting the messages - but they never arrive anywhere (not even in their postmaster a/c)

Since they are doing this from behind a firewall and refuse to open it for ssh access, I thought I'd first check if this is a known issue before I take a flight there to sort it out.

<guess> Maybe their exchange server is demanding that users authenticate before sending (this is configured with a checkbox somewhere in the Exchange Admin labyrinth, iirc). I don't know why this would cause a noticeable exception tho... </guess> Can you telnet to the smtp server and manually submit a message that gets delivered correctly? --Rob