Longtime K-9 user. Learned today my outgoing mail send from Spectrum RoadRunner e-mail account wasn't being sent. Switched on my Android to your app and same issue exists. Setting up an oh.rr.com account says your found (like K-9) an untrusted configuration. Yet when i try to use the one Spectrum wants, i get this message "unable to parse TLS packet header” when trying to send. Here are the settings they want used: SSL - on for SMTP & IMAP Protocol - IMAP Incoming and outgoing Server - mail.twc.com Incoming Server Port - 993 Outgoing Server Port - 587 Requires Authentication - Yes, or checked.