Email Settings for Posteo.at
Access your Posteo.at account from your macOS or Windows email client.
Email Settings for Posteo.at
Incoming Server - IMAP
Server: posteo.de
Port: 143
Security: STARTTLS
Username: Your full email address
Password: Your password
Outgoing Server - SMTP
Server: posteo.de
Port: 587
Security: STARTTLS
Username: Your full email address
Password: Your password