Adding a smarthost - Divert non local messages to another SMTP – atmail help centre

PROBLEM

Smarthost Servers

ENVIRONMENT

On-Premise Server + WebMail Installations: Version 6.0 > Current Version
Webmail Only Installations: Version 6.0 > Current Version

CAUSE

Rerouting required for specific servers

RESOLUTION

Messages to 'non' local accounts will be routed via the remote_smtp router in the Exim configure file /usr/local/atmail/mailserver/configure.The default rule can be modified to relay all outgoing messages via another SMTP-server ( rather then the localhost ) . This is handy for relaying messages to a remote SMTP server for processing, for example a dedicated Antivirus or Anti-Spam appliance/server.

To enable edit the Exim configure file and replace:

dnslookup:
driver = dnslookup
domains = ! +local_domains
transport = remote_smtp
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
no_more

With the following:

# This router routes addresses that are not in local domains by doing a DNS
# lookup on the domain name.
divertnonlocal:
driver = manualroute
domains = ! +local_domains
transport = remote_smtp
route_list = * smtp.domain.com
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
no_more

Where smtp.domain.com is the name of your external smtp server. The IP address of the Atmail server must have relay-access via the external SMTP server to send outgoing messages.

Save changes and restart Atmail.

/etc/init.d/atmailserver restart

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