MailScanner + webmail - issues?

[Ed Wallig]

Hi,

Brand new to MailScanner - using it in conjunction with ASSP for more
complete content protection. Here's my config:

Platform: CentOS 4
Server:   HP Proliant 3GHz Xeon, 1GB RAM 80GB IDE
MTA:      Postfix
Other:    ASSP (assp.sf.net), @Mail (client mode only)

I'm not even sure if MailScanner is the problem but my issue seems to have
started after installing MS. This box acts as an SMTP relay in my DMZ.
Mail travels in this manner:

Incoming Channel: Internet-->Firewall-->ASSP (port 25)-->postfix (port
10025)-->Internal mail server

Outgoing Channel: Internal Mail server-->ASSP (port 25)-->postfix (10025)--
>Firewall-->Internet.

This is a normal installation when using ASSP and works fine. Postfix is
configured to only relay traffic for my domain to my internal mail server.
ASSP verifies that recipient is a valid internal recipient tyhrough the
use of a flat file.

I also have the @Mail (www.atmail.com) webmail client installed on this
box. The client provides a webmail interface for my external users; it
communicates with my internal mail server via IMAP. The @Mail client uses
the SMTP engine on the internal mail server and not postfix and traffic
from the webmail client routes in this manner:

webmailclient-->internal mail server-->ASSP-->Postfix-->

I know this is a round-about path, but it provides a more complete record
of the activity on the webmail.

After installing MailScanner, it is taking anywhere from 30 seconds to 3
minutes for an email message to be sent from the webmail interface. I
don't understand this because I'm not sure how MS would interface with the
traffic at this point, shouldn't it just scan the mail once it has
returned to this box via the outgoing channel?

In any event, I'm at my wits' end; support for @Mail is slow in coming so
I'm hoping that someone else has had a similar issue.

Any ideas? Thanks in advance...

 - Ed

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