Disposable emails (blacklist)

Since TML leaves most hooks intact, I suspect Ban Hammer will work without problem. Did you try it yet?

Otherwise, simple hook into the registration_errors filter
https://codex.www.ads-software.com/Plugin_API/Filter_Reference/registration_errors
For example, put this in functions.php (it’s untested):

function disallow_banned_email_domains( $errors, $sanitized_user_login, $user_email ) {
    $blacklist = [
        'binkmail.com',
        'bobmail.info',
        'chammy.info',
        'devnullmail.com',
        'letthemeatspam.com',
        'mailinater.com',
        'mailinator.net',
        'mailinator2.com',
        'notmailinator.com',
        'reallymymail.com',
        'reconmail.com',
        'safetymail.info',
        'sendspamhere.com',
        'sogetthis.com',
        'spambooger.com',
        'spamherelots.com',
        'spamhereplease.com',
        'spamthisplease.com',
        'streetwisemail.com',
        'suremail.info',
        'thisisnotmyrealemail.com',
        'tradermail.info',
        'veryrealemail.com',
        'zippymail.info',
    ];
    list($name, $domain) = explode( '@', $user_email );
    if ( in_array( $domain, $blacklist ) ) {
        $errors->add( 'blacklisted_email', __( '<strong>ERROR</strong>: Your email has been banned.', 'my_textdomain' ) );
    }
    return $errors;
}

add_filter( 'registration_errors', 'disallow_banned_email_domains', 10, 3 );

Don’t forget this is a arms race you will lose in the end if someone really really wants to register with a disposable e-mail address!

Thank you TacoV. I’ll try both methods and reply.
Will be awesome if plugin developer add such function.

I’ll keep it in mind, @pistolero85! You rock, @tacov!

Thank you for reply Jeff. This function will be very useful. I’m now working to change the plugin WP-Members to TML. Your plugin is much better for me.

@tacov – Ban Hammer is working fine, recently tested. But your script isn’t working, getting errors

Well, if you want the script to work, you should post what errors you get. But probably it’s better to stick to a full plugin, as this is probably way more full-featured.

If you have an old php version maybe you should replace the new array notation
[…]
with the old one:
Array(…)