I’ve had numerous issues with this part of TripleA for a while.
To avoid overwhelming you, I’ll just ask for help on one issue first.
For some reason, even when I put in a perfectly valid email address in the “to” section, I can’t send test emails or play for some reason. Note that all the other boxes (including setting up the dice server initially) seem to be okay.

I already closed and reopened TripleA and tried different emails to no success.
Does anyone know a solution or explanation for this? Thank you!
EDIT: I forgot to mention, but the reason why I used those specific emails is because I used to be able to play numerous games with the other player with no problem, using those emails, and now it seems that I can’t. In other words, the Yahoo-Gmail difference wasn’t an issue in the past.