>I am allowing external users to relay mail via SMTP Authentication.
>Twice this week I have had customers calling me to tell me they
>cannot send mail. These are customers that have been setup for
>months now. It also happened to me today. The dreaded 550 error. The
>SMTP service seems to just quit working. I looked in the Ipswitch
>database found nothing. After rebooting the server, it comes back up and works.
>
>Please let me know if you have experienced this before.
yes, many here have this pb. It is a major
weakness. Specifically, there is an SMTPD process, different from
the SMTPD process that is holding the session with the SMTP client,
that does the SMTP AUTH function. When its dead, the SMTP session
dies just after the SMTP client (a user's mail pgm) asks for key to
encrypt the username + password. The SMTPD AUTH process doesn't
respond. This gives no error 550, it gives nothing at all.
The other situation is when the SMTPD AUTH process is running fine,
but cannot get to the username + password info, say in an external
database due to ODBC pb's or whatever. Here the SMTPD AUTH process
returns fatale error "550 unknown user".
There have been situation where IE clients could SMTP AUTH but NS
clients couldn't.
Len
BIND8NT.MEIway.com : Binary for ISC BIND 8.2.3 T6B for NT4 & W2K
IMGate.MEIway.com : Build free, hi-perf, anti-spam mail gateways
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
An Archive of this list is available at:
http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
