I inherited a WordPress website from a company whose webmaster passed away. They had/have a listserv that they use. However, the listserv isn't working, and I'm trying to figure out where it is hosted. I don't know that much about listservs. However, I see in the DNS that they have two MX records pointing to safesecureweb.com, which looks like it might be connected to SmarterTools?  Can anyone help me?