bloop.email
IMAP settings

Posteo IMAP and SMTP settings

The server settings to add Posteo to any mail app, for addresses ending in @posteo.de or @posteo.net.

Incoming mail (IMAP)
Serverposteo.de
Port993
SecuritySSL/TLS
Outgoing mail (SMTP)
Serverposteo.de
Port465
SecuritySSL/TLS
Sign-in
UsernameYour full Posteo email address
PasswordAn app password created in your Posteo settings.

From Posteo Help: How do I set up Posteo in an email client?. Check there if something has changed.

Before you start

Use Posteo in a native Mac app

Bloop.email works with any IMAP account. Enter these settings once, and Posteo sits next to your other inboxes, with trackers blocked and nothing between your Mac and your provider.