Well, you know my feelings on all these toolbars. Maybe they are acting against one another? I would certainly only have one mail checker in action at any one time. The Hotmail issue could be that they (Hotmail) have changed the cookie, or maybe your cookies have been deleted. Allow the Hotmail cookie in Firefox (Tools > Options > Privacy > Exceptions, then type hotmail.com and click Allow), and see if that sorts it out. As for the others, try looking in Comodo firewall for both of the toolbars under Applications (?), remove them, then next time it asks, allow them again. Can't think of anything else to try at the moment. It's much easier if you use a mail client, such as Thunderbird, but if you use the free Webmail services, most of them don't allow POP3 without charging a fee for it, unfortunately.