XWall ISP Edition allows an unlimited amount of inbound domains and Exchange servers

How to configure more than one Exchange

• select View->E-Mail domain on Exchange and add all your domains to the list
   
• select Options->General->Exchange and type in the name or IP address
  of the default Exchange server
  
  Note: All domains that have not specific Exchange are sent to this Exchange.
   
• select Options->General->Exchange->Specify by Domain to define
  an additional Exchange server for a domain
  
  Note: By default this Exchange servers are allowed to relay and they are excluded from Greylisting and any other methods that reject a message during the smtp session.
   
• You may exclude this Exchange server from all spam checking by
  adding  the name or IP address in Options->Exclude->IP/Host

How to configure different setting for an e-mail address or a domain

By default XWall uses the same settings for all domains and e-mail addresses unless you define different setting for an e-mail address or a domain.

The following sample assumes that you want to set different settings for the e-mail address user@domain1.com and for all e-mail addresses of domain2.com. Adjust the sample lines and then add them to XWall.ini

• Action
  
  InboundUserAction=user@domain1.com:att:4
  InboundUserAction=@domain1.com:bayes:0
  
  The methods are:
  att, expl, subj, text, html, bcc, faked-from, from-us, ccs , dsn, mx , spf, surbl ,heuristic, hdr, ip, e-mail, bayes, sls, img, cty, phish, charset, auto-ip, senderbase, udm, abs
  
  The actions are:
  0 - Discard message
  1 - Encapsulate and forward to postmaster
  2 - Encapsulate and send to recipient
  3 - Encapsulate and send to recipient without attachments
  4 - Send a non-delivery report to the sender
  5 - Mark subject and move to Junk-E-Mail folder
  6 - Forward to postmaster
  7 - Mark subject
  8 - Process as usual ( needs at least v3.35e )
   
• Mark Subject
  
  InboundUserMarkSubject=user@domain1.com:att:[AnyText]
  InboundUserMarkSubject=domain2.com:subj:[AnyText]
  
  The methods are the same as for the user defined action
   
• Postmaster / Spam folder
  
  InboundUserSpamFolder=user@domain1.com:pf@domain1.com
  InboundUserSpamFolder=@domain2.com:pf@domain2.com
   
• Message size limit
  
  InboundUserSizeLimit=user@domain1.com:524288
  InboundUserSizeLimit=domain2.com:20971520
   
• Non-delivery Report From: e-mail address
  
  InboundUserNDRFrom=user@domain1.com:pf@domain1.com
  InboundUserNDRFrom=@domain2.com:pf@domain2.com

How to verify the recipient against Exchange

By default XWall uses either a script and LDAP or a static database to verify the recipients e-mail address.
However,  XWall can also query Exchange for the recipients e-mail address.

After the sending server issued the RCPT TO: with the recipients e-mail address,  XWall opens a new SMTP connection to Exchange and send the RCPT TO: with the recipients e-mail address to Exchange. If Exchange accepts the recipient, then XWall knows that the recipient is valid and accepts the message from the sender.

To enable this add the following lines to XWall.ini

ExchInboundEMailAddressQuery=True
ExchInboundEMailAddressQueryInternal=True

Domain based White List