Check_MK Disable Direct Mail Sending and Enforce Relay Usage

[kayiwa]

Description:

Currently, the server pulcheck-staging1 is configured to send mail directly. This needs to be changed to ensure all outgoing mail is routed through our authorized mail relays for security and deliverability reasons.

Tasks:

• Modify Postfix configuration (main.cf):
• Configure Postfix to use the authorized mail relays lib-pony-expr.princeton.edu
• Ensure proper authentication with the relay servers if required.
• Verify configuration:
• Restart Postfix.
• Send test emails to internal and external recipients.
• Check mail logs to confirm relay usage and successful delivery.
• add checkmk-servers to the allowlist of the postfix servers
  • pulcheck-staging1
  • pulcheck-prod1
• Does our checkmk role automatically configure postfix?

Environment:

Server: pulcheck-staging1
Operating System: Ubuntu
Postfix:

Please document the specific configuration changes made in this ticket.
If there are any existing scripts or applications that send mail directly, they will need to be updated to use the relay servers.
Priority: High