MacOS – Apple Mail marks email as read

Check to see if Gmail on your Mac is set up to use IMAP instead of POP3 by going to Preferences > Accounts in Mail. IMAP syncs the read / unread status (among a host of other benefits).

If it's not set up to use IMAP then you'll have to remove the account and add it again, this time making sure to select IMAP in the account wizard.

When you create an email Mail.app saves a draft. When you type a few more letters Mail.app deletes the old draft and saves a new one.

If you have "store draft messages on the server" selected (Preferences -> Accounts -> (select account) -> Mailbox behaviours) then every time you make an edit Mail.app sends it to Google then deletes any old drafts. Unfortunately, Google doesn't really delete the old drafts. Instead it moves them to the Bin folder and when you search in Mail.app it finds these hundreds of old drafts.

To stop this occurring on future drafts uncheck "store draft messages on the server" for all my Gmail accounts.

To clear up your old drafts log into to Gmail directly and: * Go to the All Mail folder and manually select and delete all the old drafts * Go to the Bin folder and select "Empty Bin"