The SMTP server settings for Bellsouth are SMTP.mail.att.net. This server is used to send out emails from Bellsouth accounts. It is important to have the correct server settings to ensure emails are delivered properly. Additionally, it is important to have user authentication enabled to ensure that emails are sent securely. When setting up an email client, Bellsouth users should use the SMTP server settings of smtp.mail.att.net with the appropriate port number, user name, and password. Furthermore, it is important to make sure that the encryption type is set to TLS or SSL to ensure that emails are sent securely. By having the correct server settings, Bellsouth users can be sure that their emails can be sent and received properly.