Tried this, appears to have worked
- Mail Preferences
- Account Tab
- Select 'Edit SMTP Server List' from the Outgoing Mail Server: pop up
- In the edit screen, go to the Advanced Tab
- Enter your email account password ***** save.
Hi, i had the exact same problem after upgrading to 10.8.2. all my gmail accounts in my Apple Mail account suddenly stopped sending mail and it doesn't accept my password.
After an exhausting all options, i finally found a fix. The problem is most likely with gmail (or maybe apple too).
Google introduced a new security measure called 2-step verification which assigns a unique password ***** application that uses gmail - which you are supposed to only enter once. Current settings for 2-Step Verfication is set at OFF. You can turn this ON by logging into your gmail via web and go to ACCOUNT SETTINGS under SECURITY.
I turned ON my 2-step verification followed the instructions and clicked on generate password ***** my APPLE MAIL and used that new password ***** my APPLE MAIL gmail password. Don't forget to change the password ***** the SMTP server as well.
I used the same password ***** my iOS Mail and it works too.
Everything started working again....I know it is a bit of an effort especially if you have multiple gmail accounts but anything that improves your online security is worth doing. Gmail said we only have to input the long passwords once - let's hope it's true.
I'm attaching a link on gmail's 2-step verifcation setup. Hope this helps! Cheers!