Hey guys I've been on the forum before but I forgot my information so I made a new account. Anyways, I've been having a nagging problem with signing up for things online. Whenever I type in my email address, for some reason, it always tells me that the "email address is invalid." I type my email address correctly and check it a million times, but it still happens often. Any ideas? Could it be something with my Macbook Pro? It's getting really aggravating!