I have the plan which allows me 3 domains, I tried to setup 3 email boxes/accounts but only the first 1 works. I can't seem to get the other 2 up and running.

Example, my 1st email is first.com and it works, but I try to setup second.com and third.com and it hasn't finished verification on the txt record verification. I've waited about 2 days for it to be verified. If it's verified or once it's verified, what are the steps to setup second.com email and third.com email? Those are examples lol

Thank you