How to Set Up Email With One Domain on Two Different Servers?

To manage this properly, your primary mail server should receive all emails. It will check if the user mailbox exists locally and deliver it there. If not, then it should route it to the other server.

Without knowing specifics about the suites you're using, I can't provide exact instructions. But definitely check the knowledge bases for setting up email co-existence—it might have the details you need.

This isn't really an issue, just how SMTP works. You could set up another domain for routing if you really need two servers, but that could get messy. Honestly, it might be simpler to just stick with one productivity suite.

What you're looking for is known as split delivery or split mail routing. Basically, you'll need to point your MX records to the server with the most users—in your case, that’s Suite A. From there, A can forward emails meant for you ([email protected]) to Suite B. Also, remember to set up your SPF record to include both servers to avoid any issues with email delivery.

You're going to hit a wall if you think both platforms can share email delivery for the same address. Typically, one server has to be the primary for inbound mail. If either suite has free forwarding options, that might help! Otherwise, just keep everyone on the same platform long-term—it'll save you a lot of headaches down the line.