Sophos Email customers using IP-based mailflow rule connectors must migrate to certificate-based configuration by March 31st. To see if you're affected Click Here.

This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Sophos MTA relay as smarthost desination

https://docs.sophos.com/central/Customer/help/en-us/central/Customer/tasks/settingupsmtp.html

Reviewing the documentation on using the outbound relay with Exchange and having the outbound mta as a smart host. What prevents unauthorized servers from connecting to it and using it as an open relay and sending e-mail with my domain. I understand there is spf but wouldn't spf allow mail flow it since the sender IP at that point is matching to the Sophos relay IP?



Added tags
[edited by: Raphael Alganes at 3:12 AM (GMT -7) on 7 Jun 2023]
Parents Reply Children
No Data