Troubleshooting Yosemite Apple Mail Upgrade Issues

There have been issues with the latest update to Apple Mail program, Yosemite, which is causing issues with customer accounts, resulting in the program itself breaking or locking users out.

The instructions below should help with customers struggling to connect to their email servers through Yosemite Apple Mail:

Start by closing Apple Mail
Check that you’re using the correct username and password by logging into Webmail (webmail.yourdomain.tld)
You will need to remove the SMTP (outgoing mail server) password from your Keychain, to do this:
Go to Applications -> Utilities -> Keychain Access
In the Keychain search bar enter the name of your SMTP server
For Cloud this would most likely be smtp.yourdomain.tld or smtp.netregistry.net
For cPanel this is mail.yourdomain.tld or possibly search for the phrase ezyreg.com
Delete all of the relevant password entries for your SMTP server(s)
Open Apple Mail again, click on Preferences -> Accounts, select your email account
Select your SMTP server from the Edit SMTP Servers list, and re-enter the password(s) you've just deleted
If this doesn't work, backup a copy of your emails
Go to Preferences > Accounts, delete the account, including the SMTP (Outgoing) server
Follow this article to set up your email account again
Please don't hesitate to support if you have any further issues.