Using gmail with mutt (2016)
smalldata.tech
smalldata.tech
And I stand slightly corrected: by customizing email image URLs, you can apparently track the first open, but not user details (IP address, device, subsequent opens, etc.) https://customer.io/blog/gmail-loading-images.html
That’s why I use notmuch with emacs. I can view text emails as text & HTML emails as HTML — and I can open them in an external browser, too, with just a few keystrokes.
Also, a local notmuch is extremely fast. I find that it’s far, far faster than Gmail or Inbox.
Maybe one time, I'll be able to stick with mutt.
https://github.com/gauteh/gmailieer and http://isync.sourceforge.net/ are tools I've used for this. isync/mbsync is a high performance IMAP based syncing tool that works well with for large mail spools. gmailieer uses the gmail API so it only works with gmail but has good support for two-way tag syncing.
Some advantages of this approach are very fast local access and and the ability to use your preferred local indexing and tagging tools (notmuch under emacs in my case).
PS, I forgot that gmailieer is notmuch-only but I think some mutt users use notmuch for indexing so it could still be useful.
edit: using the trick in the page seems to have done the worked. It would seem that my account access got locked during my last attempt. Time to run some backup !