The same thing always happens, as I can attest as someone who runs a hosting company with email servers. I get a support request to check their email address because they are not getting any mail. Sometimes, it can be fixed without asking questions and sometimes it can’t. Then, since we are unable to communicate with that person, the support request goes unanswered until they reach out to us in a different way. The best way to avoid this situation is to always have a back up email address. Google’s G Mail is a perfect program for this. It’s free and reliable. I do not recommend it for a main business address. Your business email address should be associated with your web site address. First, it’s more professional and secondly it can be construed that you are not a genuine business.
A backup email program will allow you to communicate even when your main email address has a problem or worse, when it gets hacked. I also prefer to use it when I’m not sure if I want the other party finding out who I am right away. Sometimes giving your business email address can get you swamped with spam. Let G Mail catch it all. Also, get rid of your AOL address. It has a bad reputation in the business world and not very professional.