DKIM Questions

Hi Mabaho,

Thanks for reaching out, and welcome to the Community! 

You don't have to configure DKIM on your mail server for outbound emails if sent through the Central Email. The DKIM configuration requires only at the last hop. In this case, it’s Central Email. 

Check out the following reference document: 

• DKIM keys

Thanks,

What happens if DKIM is configured on 365 as well as Sophos Central Email?

Hi Ian Hellier,

Apologies for the delayed response!

If DKIM is configured on both Sophos Central Email and O365, it’ll break the outbound email flow since the last hop could change the email in a way that would invalidate the hashes created by the previous hop. Let me know if you have any follow-up questions. 

Thanks,

Hi Ian Hellier,

Apologies for the delayed response!

If DKIM is configured on both Sophos Central Email and O365, it’ll break the outbound email flow since the last hop could change the email in a way that would invalidate the hashes created by the previous hop. Let me know if you have any follow-up questions. 

Thanks,