Variants of this question keeps showing up from time to time. It goes roughly like this:
I am migrating email for example.com from provider A to provider B. During migration I will have some users on provider A and other users on provider B. I created MX records for example.com pointing to both A's servers and B's servers. But it doesn't work.
The most recent such question.
I went to look for a canonical question with a suitable answer. I didn't find a canonical question, but I found two good candidates:
- MX Records - go to two servers?
- 1 domain 2 MX ? Is it possiable to set two MX Record for one domain?
Should we appoint one of those two questions to be canonical?