Modify the rDNS for each IPv4 address to point to the desired domain.
Warning title Important:
- An incorrect rDNS configuration may cause mail servers to reject your server's mail.
- For more information, read our How to Configure Reverse DNS for BIND in WHM documentation.
Enable the Send mail from account's dedicated IP address option in WHM's Exim Configuration Manager interface ( Home >> Service Configuration >> Exim Configuration Manager ).
Warning title Warning:
If you select this option, cPanel & WHM uses the
/usr/local/cpanel/scripts/updateuserdomainsscript to automatically configure Exim, and overrides any manual changes in the following files:
To use a custom Exim configuration, you must enable the following options in the Basic Editor section of WHM's Exim Configuration Manager interface (Home >> Service Configuration >> Exim Configuration Manager):
If you change the outgoing IP address to a non-cPanel main IP address, the cPanel user must update that email address' SPF record. They can configure the SPF record in cPanel's Email Deliverability interface (cPanel >> Home >> Email >> Email Deliverability).
In cPanel & WHM version 76 and earlier, this interface is cPanel's Authentication interface (cPanel >> Home >> Email >> Authentication).
/etc/mailhelo file contains Exim's configuration for the
HELO command, which initiates dialog between a mail server and a client. This file governs which domain sends the