diff -u b/modules/filter/filter.module b/modules/filter/filter.module
--- b/modules/filter/filter.module
+++ b/modules/filter/filter.module
@@ -1499,9 +1499,9 @@
   // Match e-mail addresses.
   // Mail domain pattern differs from the general domain pattern by requiring
   // a subdomain match. This allows patterns like foo@bar in text without
-  // being converted to a mailto -link.
+  // being converted to a mailto link.
   $email_domain = '(?:[A-Za-z0-9._+-]+\.)+[A-Za-z]{2,64}\b';
-  $url_pattern = "[A-Za-z0-9._-]{1,254}@(?:$email_domain)";
+  $url_pattern = "[A-Za-z0-9._+-]{1,254}@(?:$email_domain)";
   $pattern = "`($url_pattern)`";
   $tasks['_filter_url_parse_email_links'] = $pattern;