Wix is hosting my domain and I'm using G-Suite for my mail. I was having trouble sending mail and discovered that google is not authenticating my mail. I had gone thru the process of entering the proper DNS setting a couple months ago so was surprised. I tried set the DKIM text again, but after several attempts and a week of waiting for it to start working, I finally discovered the problem. Wix limits TXT entries to 255 characters, and the entry supplied by google has 410 characters.
How does one enter more than 255 characters on Wix?
Update: Figured out that if I use a 1024 key instead of 2048 key, the DKIM entry will now fit.
So I guess this post is a cautionary tale.