Cannot send e-mail
Hi
I upgraded to OS X Yosemite a couple of days ago and today my e-mail stopped working. I have a POP account and use a Plusnet account. I've managed to restore the incoming e-mail but continue to not be able to send e-mail.
I've searched through the Apple support forum and other internet forum and have tried some of the suggestions for dealing with Mail issues such as disabling the automatic detect and maintain account settings options and have allowed insecure authentication. I have also spoken to my e-mail/internet provider and they could not resolve the issue on their end.
I'm using port 587 (which the e-mail provider confirms is correct), have unchecked SSL and the e-mail and account details all seem fine.
Could anyone suggest anything that might get sending e-mails using Mail working again? Should I revert to Mavericks (if this is possible) where I had no problems with Mail?
Many thanks
MacBook Pro (13-inch Mid 2009), OS X Yosemite (10.10)