This part of what I wrote above is inaccurate ❌.
That POP Download feature is so non-Gmail clients can access email, in Gmail, via POP3.
✅ The correct setting, at Gmail, is Check emails from other accounts under Accounts and Import.
It's here where you will add the OS email address, server, username, password, port (995).
More information:
https://support.google.com/mail/answer/21289
I recently set this up and everything seems to be working as expected.
I set both forward to @gmail.com and deliver to os mailbox in the OS control panel. I did this because I was concerned about the possible delivery delay (maybe up to 1h) associated with Gmail accessing the OS mailbox via POP. (In my quick testing though, that wasn't really an issue. Gmail seemed to be checking that box very quickly. But I haven't tested this much.)
This way:
- Emails are
forwarded to Gmail and arrive there almost immediately.
- Whenever Gmail checks, via POP, the same email is downloaded, but is found to be a duplicate and doesn't seem to clutter the Gmail inbox. 👍🏻 (I'm assuming it's discarded somehow.)
- In the case where the
forward fails (because of the fundamental issue this thread is about), the email should be downloaded by Gmail, via POP, eventually.
That seems to be working as expected.
(Although, there haven't yet been any emails that are expected to be non-deliverable/bounced. I'll update this thread if that happens and something unexpected occurs.)
