The iPhone can be more sensitive when it comes to POP/IMAP and SMTP settings than other systems. For the iPhone using our POP, products (VISI and Custom Domains) the following settings should be used.
Incoming mail server: "pop3mail.visi.com" or "imapmail.visi.com"
Username: Full E-mail address.
Authentication: Password
Outgoing mail server: "smtpmail.visi.com"
Username: Full E-mail address.
Authentication: Password