Hi all, New to posting on a Mac Forum. I've read some of the other threads about this and could not find an answer. My Mac Mail won't send. It does it randomly and then sometimes fixes itself. However, it's been going on for over 24 hours now. I've rebooted, called my outgoing mail server and spent 1 hour on the phone with them trying all sorts of different ports, and we can't get it to send. I can receive emails. I have Macbook 2008 OS x Yosemite 10.10.2 Mac Mail 8.2 Using 3rd party outgoing server (also tried Comcast outgoing server) port 587 SSL unchecked. Password authentication HELP! I need to get a bunch of contracts mailed out!!