Setting up Posteo in an email client (whether on PC, smartphone or tablet) is different for each client, however, you will always need the following details:
Server name: posteo.de
Password: Your personal password
Important: only encrypted connections (STARTTLS, TLS) can be made with Posteo. Should your email client only support obsolete versions of TLS (TLS 1.0), synchronisation with Posteo is not possible. Update your software in order to connect with Posteo.
Does your app or device no longer offer updates? Posteo support is happy to help you find an app for your device that supports modern encryption standards.
The outgoing mail server (SMTP) requires authentication.
In case your email client asks: The password will be checked “normal” or “plain”. The password can also be transmitted unencrypted, because it is requested over a connection that is already encrypted.
The port settings depend upon the type of encryption:
With STARTTLS using port 587, or
with SSL/TLS encryption using port 465
With STARTTLS using port 143, or
with SSL/TLS encryption using port 993
With STARTTLS using port 110, or
with SSL/TLS encryption using port 995
The standard IMAP folders we have set up:
For sent emails: Sent
For deleted emails: Trash
For drafts: Drafts