Bear with me, as I'm not very knowledgeable when it comes to email... At my office, we have an Exchange server for our email system. We also have a website where customers can send us email, but when they do it just fires an email off to an account on our network. We're about to change web hosts from our current company to another company, and I'm wondering if anything needs to be done in preparation.
As far as I can tell, we are completely self-sufficient and changing web hosts for our web site will not change anything, but I'm being asked questions by our new web host that I can't answer with confidence. The latest says "If [my company] is hosting its own email on an exchange server then a MX record exist with [our old web host] and that needs to stay intact."
At one point our web host did host our email as well, but that hasn't been the case for years. I've already checked to make sure that our mail is directed at us, as an external lookup yielded our mail server's external IP. Would our old web host have our MX record then, or would it be located on our server? How do I check, and is there a way to determine if I'm self-sufficient here so that I can answer outright that we no longer have any ties to our old web host?