[drupal-devel] [feature] Better validation of new users email address when creating account

budda drupal-devel at drupal.org
Wed Feb 23 01:26:58 UTC 2005

 Project:      Drupal
 Version:      4.5.2
 Component:    user.module
 Category:     feature requests
 Priority:     normal
 Assigned to:  Anonymous
 Reported by:  budda
 Updated by:   budda
 Status:       patch

Working with the user.module of 4.5.2 distribution I amended the
user_validate_mail() function to provide additional checking for a new
This was inspired by the constant bounced emails I was getting each day
from new users mistyping their email address.
Sorry that the code is not in patch form. The following code should be
placed in user.module :-
function _user_check_dnsrr($maildomain, $rectype = 'MX')
  if(!empty($maildomain)) {
    if(function_exists('checkdnsrr')) {
      return checkdnsrr($maildomain, $rectype);
    } else {
      exec("nslookup -type=$rectype $maildomain", $result);
      foreach ($result as $line) {
        if(eregi("^$maildomain",$line)) {
          return true;
      return false;
  return false;
function user_validate_mail($mail) {
  if (!$mail) return t('You must enter an e-mail address.');
  list($username, $maildomain) = split("@", $mail);
  if (!valid_email_address($mail) || !_user_check_dnsrr($maildomain,
"MX")) {
    return t('The e-mail address %mail is not valid.', array('%mail' =>
I have been using the above on
http://www.bargainspy.co.uk/user/register without problem for a day
now. Another step in the direction of helping users hide their general


View: http://drupal.org/node/17780
Edit: http://drupal.org/project/comments/add/17780

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