Resetting your IMAP settings may require you to remove and re-enter the same server name.
This results in your device reconnecting to the mail server to grab the latest settings.
Even if your email client already has the correct server name listed, it is important that you follow the directions below to remove and re-enter the server name in order to reset your device.
1. Open Apple Mail
2. In the Upper left, click Mail then Preferences:
3. Choose your EarthLink account, then click Advanced:
4. Erase the hostname of imap.earthlink.net:
5. Then enter the same setting, imap.earthlink.net – click OK: