Hi,
Welcome to BuddyDev forums.

Even though the auto activation is enabled, WordPress users must have an email address associated with their account. WordPress will not allow user registration if the email address is not specified.

In other words, It is possible to overcome this by specifying an email on invalid domain but you can not remove the requirement completely.

Please do note that specifying the invalid email will make accounts inaccessible and difficult to identify when they forget password.

Regards
Brajesh

Hi,
You can put the following code in your theme’s functions.php or in the wp-content/plugins/bp-custom.php

/**
 * Update BuddyPress signup email to an invalid address
 */
function buddydev_update_bp_signup_email() {
	// we use the username to create emails, It is needed.
	if ( empty( $_POST['signup_username'] ) ) {
		return;
	}

	$temp_email = $_POST['signup_username'] . random_int( 1, 1000 ) . '@example.com';

	$_POST['signup_email'] = $temp_email;
}

add_action( 'bp_signup_pre_validate', 'buddydev_update_bp_signup_email' );

That removes the email from requirement.

You will need to hide email field though.

Here is css

label[for="signup_email"], 
#signup_email{
	display:none !important;
}

You can use the css or simply remove the fields form register.php

Hope this helps.

Regards
Brajesh

Please make sure that you copy the code from the topic here and not from the mail.

The code sent on email notification is entity encoded and will cause issue.

Please check if copying from here works or not?

Regards
Brajesh

You are welcome 🙂