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.
Under the Restrict delivery to Sophos IP address, no additional instruction was given to complete configuration properly. I recently set up my email gateway on Sophos central. After that, I didn't receive an inbound delivery. I can only send an email but not receive. A Sophos tech notified me I need to restrict delivery to Sophos IP address. Please, any suggestion?
Henry
Lets wrap up.
Inbound:
MX Technology. https://en.wikipedia.org/wiki/MX_record
A Sender will lookup your MX Record and send the mail to this record.
This MX should only be/point to Central.
Central will take this email, scan it and deliver it to the "next hop". Next hop:
Central will use the "Sophos Delivery IPs" to send you the Emails in this step.
So basically you need to configure those IPs in your Mail server / exchange / etc. to accept all Mails from those IP addresses, no matter what.
Outbound:
Mail generated by your Mail Server / exchange etc. will be send to the out bound Relay Host.
Central will accept those emails, and deliver those emails to the proper next hop.
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