Block emails

Hello,

I created a new topic to know the procedure to block the registration of email extensions.

I had for the 7.0.9 version, but it does not work.
I would like to have the procedure for version 7.1.2

Thank you in advance

Hello,

Someone an idea?

thank you

Hello,

I would like to block email extensions (version 7.1.2)
(example: @gmx, @sohu)

How?
thank you