A BellSouth email settings is for the IMAP on iPhone and in Android devices. You must configure the mail server settings for these accounts. Specific parameters for these settings depends on the type of account. Any SMTP (Simple Mail Transfer Protocol ) address to identify a BellSouth email server IMAP and POP3. Authentication failure when sending mail from an external email provider is typically caused by misconfiguring authentication settings in the authentication settings. This article guide instructions on how to configure an imap client on your device to connect with BellSouth's ISP email server. If this doesn't setup just call BellSouth has a toll-free customer service number and a website to provide phone support on a 24/7 basis.