Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

backdrop_mail in includes/mail.inc
Composes and optionally sends an e-mail message.
backdrop_wrap_mail in includes/mail.inc
Performs format=flowed soft wrapping for mail (RFC 3676).
contact_mail in modules/contact/contact.module
Implements hook_mail().
drupal_mail in includes/drupal.inc
Composes and optionally sends an e-mail message.
drupal_wrap_mail in includes/drupal.inc
Performs format=flowed soft wrapping for mail (RFC 3676).
system_mail in modules/system/system.module
Implements hook_mail().
update_mail in modules/update/update.module
Implements hook_mail().
user_load_by_mail in modules/user/user.module
Fetch a user object by email address.
user_mail in modules/user/user.module
Implements hook_mail().