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Managing Messages > Configuring relay control options
Configuring relay control options
Administrator Help | TRITON AP-EMAIL | Version 8.0.x
You can prevent the unauthorized use of your mail system as an open relay by limiting the domains and IP address groups for which your server is allowed to relay mail. Protected domains are defined in the Settings > Users > Domain Groups page. Trusted IP address groups are defined in the Settings > Inbound/Outbound > IP Groups page.
Configure relay control settings in the Settings > Inbound/Outbound > Relay Control page as follows:
1.
In the Inbound Relay Options section, set any desired option that is based on the Sender Policy Framework (SPF) of the sender domain:
*
Reject mail if no SPF record exists.
*
Reject mail if the SPF record does not match the sender's domain or a soft fail occurs.
A "soft fail" result means the result of the check is inconclusive regarding the sender domain.
*
Reject mail if an SPF error occurs.
By default, these options are not enabled.
2.
In the Bypass SPF Option box, you can specify a sender domain group for which SPF settings are bypassed.
a.
Mark the Bypass SPF validation for senders in the following domain group check box.
b.
Select a sender domain from the Domain group drop-down list.
3.
In the Outbound Relay Options section, select the relay setting for senders in protected domains when SMTP authentication is not required. Default setting is Allow relays only for senders from trusted IP addresses.
You must use the default setting if you use SMTP authentication.
Note that allowing all outbound relays may create a security vulnerability in your system.
4.
In the Internal Relay Options section, select the relay setting for mail between protected domains when SMTP authentication is not required. Default setting is Allow relays only for senders from trusted IP addresses.
You must use the default setting if you use SMTP authentication.
Note that allowing all outbound relays may create a security vulnerability in your system.
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Managing Messages > Configuring relay control options