Herb has been having issues with one of his AT&T email accounts just stopped working in Apple Mail, and he had to spend hours to fix it. AT&T uses Yahoo mail, and it's going through a bad patch right now. What are his alternatives for a new email client? Leo says that Gmail is a great free email client that will also let you keep your existing email at AT&T and go get it from time to time. Gmail also has great spam filters. You can also get a third-party app called Spam Sieve to filter out spam before it gets to your mailbox.