gmailinbox-by-gmail
I have hundreds of old reminders that I created in the past year with Google Now that are now pinned in my "Inbox" (http://inbox.google.com).
I would like to mark all of them as "done".
I can select them one by one, is there a way to select them all? or at least several at a time?
I have just found out how to do this, thank God. When you select all messages in a page, a new line pops up just above the topmost message; in that line, there is an underlined "select all 16,000 messages". Click that, and then you can perform an operation (such as move) to all your messages.
Essentially what you want to do is set up a third-party email client (Thunderbird is great for this, but you can use just about anything that supports IMAP) and configure it to use both your old and your new email accounts.
Then you can simply drag-and-drop all the messages you want to keep out of the old account inbox into the new account inbox. This will keep your attachments as well.
Once done (and you've confirmed your messages are in the new account), you can remove the old account from Thunderbird and then cancel the account.
I've done this once or thrice, and Thunderbird is dead simple to configure with Gmail.
Best Answer
Might take a little while (depending on how many you have... and how the refresh of the screen works etc)... but show the pinned items, and hold down
[on your keyboard.You need to have "Keyboard Shortcuts" on. Click on the 3 lines in top left, then scroll to the bottom, click Settings, Under "Other", tick "Keyboard Shortcuts".