Sender verification VS Trusted SMTP IP

jlucho

• August 11, 2025 15:13

It is not clear to me, in which cases to use these 2 options in Exim Configuration Manager

A) Sender verification bypass IP addresses 

B) Trusted SMTP IP addresses

What does each of them do? In what cases would one apply and not the other? How do they differ?

• 

  jlucho

  • August 11, 2025 15:14

  option in: WHM/cPanel -> Exim Configuration Manager  -> Access List

  0
• 

  cPRex Jurassic Moderator

  • August 11, 2025 16:38

  Hey there!

  Documentation for these specific options can be found here: https://docs.cpanel.net/whm/service-configuration/exim-configuration-manager-basic-editor/

  Sender verification bypass IP addresses

  This setting allows you to edit the list of IP addresses that the system excludes from SMTP sender verification checks.

  Trusted SMTP IP addresses

  This setting allows you to edit the list of hosts or IP addresses that the system excludes from the following checks at SMTP connection time:

  • Recipient verification checks

  • Sender checks

    Note:

    These senders must still use an RFC-compliant HELO name if the Require RFC-compliant HELO setting is enabled.

     

  • Spam checks

  • Relay checks.

    Note:

    The system adds any hosts’ IP addresses that you enter here to the /etc/skipsmtpcheckhosts file.

  0

Please sign in to leave a comment.