mikrotik hotspot setup

I want to install a mikrotik hotspot, at the login page, I want to make my website accessible and my email address even though the user has not yet logged in.
How should I set this.

The website is easy. You would enter the domain name in “/ip hotspot walled-garden”. If it is an ip address, then use “/ip hotspot walled-garden ip”.

The email is difficult. Users use different types of email clients. Some are port 25, some port 465, some port 587. You might want to include a “Contact Me” page on your website that does that using your email server.

Thanks for your reply, it was usefull