u/it_happened_here

I contacted Support, but they are taking a while to respond.

Custom domain is with Namecheap and all is green. Online MX and Domain tools all show good. I have 4 different addresses for the custom domain set up in Proton Mail, and have had them up since yesterday.

I can send email OUT to other email providers and Gmail just fine. If I reply to those emails, nothing shows up in Proton Mail.

The only clue I have is 1 bounce back stating "The recipient does not exist." But it has existed for at least 24 hours.

Any ideas?

I'm glad that I tested this before moving over from 1Password. I have a lot of very large notes that are important to me. I'd like to switch over, but not sure how importing would work. Seems like a strange limitation.