I have a problem with the SMTP authentication. I'm running an IronPort C100 box in front of a sendmail system. The sendmail has all the users stored with their SASL passwords.
I'd like to set the C100 box to forward authentication requests to the sendmail box to enable people on the road to use C100 for relaying their email messages (after a successful SMTPAUTH).
What I did:
1) Created the SMTP Authentication Profile (Forward with Use SASL Login)
2) Added the profile to the external interface listener (authentication profile)
3) Edited the Mail Flow Policies default "SMTP Authentication" to preferred
When I use my Outlook Express against he C100 I get an "554"-error immediately. I also get the same error if I do a simple telnet from external laptop to the Ironport box on port 25.