Please add spam email filter like email only send to those who have email on
Gmail
Hotmail
Yahoo
Icloud

What woukd be reason?

Hello, the emails sent from the website to the users end up in the spam folder, what is the reason. Regards

@epsilon
Domain is not trustworthy enough or your users are marking mails as spam.

Only here can be selected a specific email for the ban .

Is it possible
Only you can register by specific emails
Gmail
Hotmail
Yahoo
Icloud ..... and others

A better way to determine the registration with emails from companies known globally

Anyone can mark mail as spam in their mailbox.

Anyone can mark mail as spam in their mailbox.

Does it make sense when each register a different mail to go to the mail and put spam
This is what I mean here when registering with a different email than this one
A message appears to the user

The email service you entered is not allowed. Please use a different email client to register.
    @gmail.com, @hotmail.com, @icloud.com, @live.com, @msn.com, @outlook.com,  @yahoo.com

Its' from some plugin or mod.

Its' from some plugin or mod.

Is there a plugin addition?
I didn't understand what you meant
Why not add in the ban list

You have plugin that does that.

You have plugin that does that.

I don't know of any plugins
I thought it would be merged with script osclass