| contact_mail_user_submit | modules/contact/contact.pages.inc | Process the personal contact page form submission. |
| drupal_mail | includes/mail.inc | Compose and optionally send an e-mail message. |
| drupal_set_message | includes/bootstrap.inc | Set a message which reflects the status of the performed operation. |
| flood_register_event | includes/common.inc | Register an event for the current visitor (hostname/IP) to the flood control mechanism. |
| t | includes/common.inc | Translate strings to the page language or a given language. |
| user_preferred_language | modules/user/user.module | Get the language object preferred by the user. This user preference can
be set on the user account editing page, and is only available if there
are more than one languages enabled on the site. If the user did not
choose a preferred language, or is the... |
| watchdog | includes/bootstrap.inc | Log a system message. |
