If your mail contains a large number of attachments, uncheck the Download attachments box in Sync settings and reduce the storage duration to 7 days (see steps 1 through 5 above).
Your computer will close all open programs, apply any pending updates, and start back up.
Gmail offline services only work when Gmail is open in one tab. Check your browser tabs and close any additional tabs running Gmail. Select the Start menu, then select Power in the top-right corner.If an admin disables Gmail offline for a domain, it becomes unavailable to individual users, even if they've enabled it in their Gmail settings.Take note of common issues you might experience while working in Gmail offline. (Optional) Uncheck the Download attachments box.After Implementing this setting your Yahoo mail will begin to download new emails. Now, open Mailbox Tab again and click on Get All New Mail. Here are the means by which to do that: In Mac Mail, click on Mailbox tab and then select take all accounts offline.
If did not enable work offline mode and not able to connect to the server then try to open Outlook in safe mode. Data will need to be resynced to your computer when signing back into Mail. Outlook offers working offline option to write emails in distraction free mode by disabling sending and receiving emails from the server. To delete account data from your device disable offline mail and save changes. Data stored on your device will not be deleted when signing out of your Google account or when changing your password.