Hi crockett
click on pbem
hit Register and it'll take you to MARTI then enter email. https://dice.marti.triplea-game.org/
Screenshot from 2025-06-02 21-41-39.png
I suggest a game email. Gmail wasn't working for a while but I think it's fixed. Think that's what you have.
GMX and protonmail both work I know.
Edit
A couple links that should help if you have any trouble.
https://forums.triplea-game.org/topic/4151/johnny-cat-tutorial
Pbem and Pbf are interchangeable
https://forums.triplea-game.org/topic/4076/1-trout-axis-vs-victoryfirst-allies-g40-house-rules-expansion-by-the-captain?page=1