No issue using the same email server and naming structure for signup on beehaw (as far as user email field data goes).

I mean I’ve been able to verify with a number of users in America, and in Europe that signups just “spin” on lemmy.ml and have been that way for 24 hours or so. I’ve personally tested it on iOS & Windows (Safari, librewolf and Vivaldi) as well as on multiple IPs and had a few friends in multiple countries (England, France and Germany) try as well. Something is hung up somewhere for a few people at least. I made a post about it shrug

Also there’s a few posts on r/lemmy with others having this same problem too.