Webmail sends SMTP from external IP, not localhost

[sbriscoe2]

I am trying to implement an AlterMIME script into zimbra (so I can add a disclaimer to outgoing mail).

The postfix master.cf script looks like this:

192.168.0.1:smtp    inet  n       -       n       -       -       smtpd
127.0.0.1:smtp      inet  n       -       n       -       -       smtpd
   -o content_filter=dfilt:
dfilt   unix    -       n       n       -       -       pipe
   flags=Rq user=filter argv=/opt/zimbra/postfix/conf/disclaimer -f ${sender} -- ${recipient}

(where 192.168.0.1 is my external IP)

IWhen sending mail from an IMAP client, the script works fine, but not when sending from the web client. When I swap the IPs in the script, the opposite is true. How can I get the web client to send from localhost and not from the external IP?

I tried going into the Admin UI and changing "Web mail MTA Hostname:" to localhost, but that just prevented me from sending externally.

[sbriscoe2]

Any help out there?

[phoenix]

Originally Posted by sbriscoe2

(where 192.168.0.1 is my external IP)

Actually, that isn't the external IP of your server it's a LAN IP. The details on the wiki page tell you to put the IP address of your server in that location, is that the IP of your Zimbra server?

[sbriscoe2]

Both. The external IP is the same as the internal IP. Our zimbra server is configured on a DMZ on our firewall for now.