Mac Mail can't send outgoing messages via GoogleMail Lately my Mail client can't send my outgoing messages. I have a gmail count, and it's configured properly. I can get the incoming messages all the time, but I can not send any. Also the connection doctor says the server is available.

Does anyone have an answer to that?
My mail version is Version 7.3 (1878.6).
my osx version is 10.9.4.
There appears to be a problem on Gmail's side with their SMTP servers. This seems to have afflicted all non-browser based email clients that rely on SMTP and is apparently affecting a large number of users.

By the looks of this thread, it appears that they are actively working on a solution.

I think for now, all we can do is wait on google to hopefully fix the problem on their end.

Update: the issue has now been resolved and outgoing gmail should work through Apple mail.