I'm not sure if this is the right place to post this, but is there anyway to find out what POP3 server an e-mail address uses apart from going to the hosts site and looking in their faq? I want to set up a script that checks visitors e-mail, so they type in their e-mail address and password, and the script does the rest. I know it's normally mail.whatever.com, but is there any sort of server lookup Perl could do to check?