Today I fucked up

So I am an intern, this is my first IT job. My ticket was migrating our email gateway away from going through Sophos Security to now use native Defender for Office because we upgraded our MS365 License. Ok cool. I change the MX Records in our multiple DNS Providers, Change TXT Records at our SPF tool, great. Now Email shouldn't go through Sophos anymore. Send a test mail from my private Gmail to all our domains, all arrive, check message trace, good, no sign of going through Sophos.

Now im deleting our domains in Sophos, delete the Message Flow Rule, delete the Sophos Apps in AAD. Everything seems to work. Four hours later, I'm testing around with OME encryption rules and send an email from the domain to my private Gmail. Nothing arrives. Fuck.

I tested external -> internal and internal -> internal, but didn't test internal-> external. Message trace reveals it still goes through the Sophos Connector, which I forgot to delete, that is pointing now into nothing.

Deleted the connector, it's working now. Used Message trace to find all mails in our Org that didn't go through and individually PMed them telling them to send it again. It was a virtual walk of shame. Hope I'm not getting fired.