This tag is used when the question is about real mail. Such as asking how to get a copy of Ubuntu in the mail. If you have questions regarding email, please use the the email tag.
This tag was designed for use with questions that relates to sending as an example the latest ubuntu DVD to you in mail. At the moment there are many that uses this tag, when they should have picked email. This tag is meant for questions relating to emails, such as email software etc.