Set your other accounts to forward them to your gmail with ARC headers, which gmail now supports. Used to be forwarding into gmail was almost unusable due to spam false positives, but I've found it to be significantly improved now (albeit not perfect).
I switched to doing this just last week (having been using POP3 previously). It's honestly a lot nicer in IMO, since the emails show up on the gmail side pretty much immediately instead of sometimes being delayed.
Unrelated, but I noticed this in your two comments and it seems to be something you do frequently—you’re using the wrong side of the quotation character as the apostrophe. You’re using ‘ but it should be ’. See the difference: I‘ll VS I’ll.
The page you linked to lists both ’ and ', in that order. There’s no point in being (wrongly) pedantic about either, both have strengths and weaknesses (explained in the Wikipedia pages). The point is that if someone cares to use proper typographic characters not immediately visible in the keyboard (which the person I replied to seems to), they probably care to use the right ones. Both ’ and ' are correct, but ‘ is not.
It’s interesting that you say there’s no point in being pedantic but this entire boring subthread started because you were pedantic about punctuation. A character really doesn’t matter.
Please don’t engage in bad faith. My post was very clear about its goal. It’s one thing to wrongly “correct” someone (as the poster above me did) and quite another to notice that someone is taking the care to do something but is making a mistake, and politely point them in the right direction.
Just because you don’t care about something doesn’t make it worthless or boring. If I didn’t think the OP cared I wouldn’t have pointed it out. Above all my point was constructive and took the other person’s interests into account, it was not a pedantic critique.
If you find the matter boring, I encourage you to move along. Prolonging it seems counterproductive.
Hmm, I transitioned from Gmail to my own domain years ago, but it's still Gmail. However, I'm still both receiving and sending mail from my old @gmail.com address, using POP. Do you know if that's still possible?
I also have an old Gmail account that I don't use directly anymore. Instead of POP, I set it up to forward everything to my mailbox.org account. It works for me this way for several years now. The only issue is that I don't get the spam forwarded, so you can't see if there are false positives. You can still see it in Gmail if you occasionally log in. For me, since this is a rarely used account, the spam I get is usually indeed spam, so I don't miss it. It might be different for a more active account, though.
For sending in Mailbox.org webmail there is a thing called alternative senders where I can add email addresses to send from. I have something similar on my Android K9 app, where it's under Manage identities where I can also add the allowed senders.
I set it up a long time ago this way and I'm unsure of I had to somehow configure Gmail to be able to send from my other account. But I have the same also for @live.com and @zoho.com as I was trying different providers. This allows me to easily reply to forwarded emails with the old email addresses.
