Optonline.Net E-mail Settings for iPhone

Outgoing Mail Server Configuration

Server Hostname mail.optonline.net
Server Port 465
Username The part before the @ sign of your e-mail address
Authentication Password
SSL/TLS Yes

Incoming (IMAP) Mail Server Configuration

Server Hostname mail.optonline.net
Server Port 993
Username The part before the @ sign of your e-mail address
Authentication Password
SSL/TLS Yes