NDR not sent to let user know the message failed to be delivered

We are using Sophos Gateway and routing email out of Microsoft 365 through a Sophos Smarthost. When a user sends an email that fails to be delivered due to the recipient address being misspelled or the...
Sophos Email - Choosing/Selecting a Mailbox to Protect

Is there any update from Sophos wherein protected mailboxes can be selected? This is because there are valid mailboxes that are still active, but users are resigned already.
Want Alerts for Sophos Email Protection using the API

I am trying to get the Sophos Email protection Alerts using the Common Alert API . I am unable to get any reference about how to filter only the Alerts for the Sophos Email Protection Product. Can someone...
Emails Delayed between hops.

I've been currently trying to figure out why some emails that are being sent out from our ERP system are taking an upwards of 7-10 minutes to be delivered to our companies' mailboxes. I analyzed one of...
Duplicate emails in O365 (or M365) message trace reports.

Sorry in advance if this has already been asked/answered before..... Current Sophos configuration: we are using Sophos email flow rules for inbound and outbound email. We are NOT relaying email through...