Why are only gmail accounts allowed?
I feel like this is a weird limitation to put, especially when a lot of people don't use gmail as their email provider of choice.
Could you please support more privacy oriented mail services like Protonmail as well?
Or even better, remove this absolutely insane requirement for everyone to only use a single mail service?
EDIT: I thought it might be because you are using gmail as a back-end to send your own emails through SMTP with your domain, so I checked and that is not the case. Which leaves me even more confused than before since they are hosted through Vultr, which means that this rule is absolutely arbitrary and serves no practical purpose.