Bulk mail companies can use a variety of software programs to send messages to multiple recipients, even if they don’t know their email addresses. These bulk mailer companies track the addresses that come back as undeliverable and remove them from their lists. They make the valid addresses into mailing lists, and sell them to other bulk mail companies. Because of this process, you may get junk email that’s addressed to an alphabetical list of people. You may also receive spam at an address that you’ve never used or publicized.
Note: To ensure your privacy, AT&T Internet Services does not sell or publicize your email address.