[SM-USERS] Problem when sending an email

[Julian G. <jul...@pi...>]

Hi - hoping someone can help me with a problem with a recent
squirrelmail build I have done, platform is:

Red Hat Enterprise Linux ES release 4
Qmail 1.03
Vpopmail
Mysql Ver 14.7 Distrib 4.1.12, for pc-linux-gnu (i686) using  EditLine
wrapper
Apache 1.33
PHP 4.3.11
squirrelmail-1.4.2

The server itself is behind a PIX 525 firewall. The internet facing
address is accessed via port 80 and then translated to the actual
servers internal address on port 100. Apache is configured to listen on
port 100. Port 80 CANNOT be used as this is used for another Apache
instance running on that server.

If I goto the internal address, login and compose a message the email is
sent and received as expected. In fact ALL parts of squirrelmail work as
expected.

BUT if I goto the servers external address I can login and compose a
message BUT when I hit the "Send" button I can see that IE is "Opening
Page http://xxxxxxxxx/src/compose.php". The right hand pane then goes
blank after about 20 seconds and I get the IE error "Action canceled".
BUT if I hit refresh, the page displays perfectly fine. I have tried
this on a Linux machine using Firefox and Konqueror with the exact same
results so I am pretty sure it's not IE being strange.

All other functions of squirrelmail work fine when I access the external
IP, just the "Compose" / "Send" part gives this error. DNS has been
checked several times which is fine.

Has anyone else seen this problem? I'm now completely out of ideas as to
why this happens. Any help would be appreciated.

Thanks - Julian.

Julian Grunnell
3rd Line Technical Support
PIPEX

Telephone: 0113 302 1005
Mobile: 07803 649593
Website: http://www.pipex.net