I use a Yahoo email account. I sent an email to a friend of mine about two hours ago and I'm having a problem sending it. It's still sending it as I write this thread. Also, it couldn't send another email earlier today and a message popped up saying that there was an issue with the receiver's server (I don't remember exactly what the issue was). But it said that I had to go into "Settings" and then "Mail, Contacts, Calendars" and then do something. I can't remember what that "something". Can someone please tell me how to correct this? Thanks.