SMTP Proxy stripping header info?

[phustvedt]

I use WG as a Firewall and an SMTP Proxy running on my Public IP. (Firewall has a hole for SMTP. SMTP Proxy bound to Inet only. WG SMTP server is disabled.) Proxy forwards all mail to localhost on port 2525 which is where MS IIS Virtual SMTP Server accepts mail and is scanned by GFI Mail Essentials (which only runs on MS IIS SMTP w/Exchange 5.5). MS IIS SMTP relays internal domains to Exchange 5.5 where mail is delivered to Outlook clients. I have disabled 8bitmime on the IIS SMTP.

I'm having trouble with some emails logging in the WG History (under Activity) as "SMTP: " only (no header data following "SMTP: "). Normally a message will log as "SMTP: inbound message from <source address> to <internal address>" We're getting word that these emails are being NDRed to senders with "550 request denied" errors. I'm not requiring authentication. My Relay protection is through other means (local domains only, etc.).

What would cause WG to strip certain messages and NDR them but not others. I'm not seeing any patterns or obvious config problems.

Thanks...

Pete Hustvedt
pete@hustvedt.com

[labull]

Pete,

If you turn on debug loging for SMTP Proxy you may be able get more info to help figure out what's going on.

Larry

[phustvedt]

Will do... but it'll have to wait... I set up WG as a pure Firewall only (passing port 25 directly to IIS SMTP on localhost) and did away with the proxy (I was using the proxy as a sort of monitor for SMTP traffic). All seems better now... I needed the predictability back so I did this... I'll look into it further when I can set up a test on a less critical system...

Thanks for the suggestion...

Pete