MailScanner + webmail - issues?

[Ugo Bellavance]

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Ed Wallig wrote:
> 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
> 

Well, MailScanner does increase the load on a server.  If your server is
swapping, that may explain the delays.

http://wiki.mailscanner.info/doku.php?id=documentation:test_troubleshoot:performance

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