Why is ProtonMail not permitted?
We often get asked why ProtonMail is not permitted as an email address. There are many reasons and the top one is that those wanting to hide their identity when registering for our serious forum have something to hide and they often turn out to be trolls or troublemakers. Such applicants then often try to register with false names and false locations and letting such people on the forum will simply degrade the high quality of trust amongst the members.
There is no need to use such email addresses with this forum. Other members do not see your email address at all and we never pass on members details to third parties. Only other members can see the membership list and except for the few public sections, all other posts are only seen by other members.
When you post on the forum, all others see is your username, which is made up of your first and last name, and your state and country - in smaller countries, just your country. Only the admins can see email addresses, nobody else.
Many people claim they use ProtonMail because it is "secure and anonymous"
Sorry to disillusion you, but ProtonMail is not either - as hackers have discovered. If that is your reason, you need to change your email address to lavabit.com, for example. It's the only e mail Edward Snowden used.