I have been using Mail as my e-mail client and I generally like it. Although sometimes when I try to send e-mails, it says it is unable to send them for some reason, and I leave it in outgoing mail, but it never will send them and I have to send it from my other e-mail server. I don't really know what types of e-mails it won't send vs. those it will send. Does anyone else encounter this problem or know why this occurs? Thanks!