XMailforum is a readonly knowledge archive now.

New way of filtering messages. I have been beta testing a product called eWall, which can be found at http://sssolutions.net/ew

It is a SMTP Firewall, very very cool, for those interested.

Features:

Supports any RFC-2821 compliant mail server.
Email address harvesters protection.
Fast multi-threaded engine brings the mail server capabilities to your customers in real time with minimal delay.
Unique technologie makes it transparent for common client commands (for example, authentication, verificaion etc.) - your users will think they still work with mail server directly.
High performance mail processing routines partially written in Assembler and created specially for eWall - it adds message text and strips an attachments during only few milliseconds for common emails.
Supports various anti-virus software (please see F.A.Q. section for full list).
Supports DNS Black Lists and GeoIP.
Supports unique Black/White list per user/domain.
An ability to send custom response to user client before to reject the connection.
Easy to use Filter Editor to create complex nested filters for various purpose. For example, you can specify virus checking in Default Filters and/or assign unique filters for each user.
Daily Activity Monitor display the connections (on picture rejected connections have an orange color) and data transfer stats.
Extensive log capabilities allow to select what events to log (System/Client/Server/Delivery/Filters) with several levels of verbosity - you won't miss anything.
By default eWall installed in Trial mode. The Trial version has two limitations:
It adds eWall footer to every processed message.
It stops after one hour after you start it.

Newly added:-
Added new option "Extended DNSBL check" (Options -> Misc tab). It will
check not only sender IP, but also each non-local IP in "Received" header in
reverse order.


This works great with Xmail.

David