Posteo Help Help categories Article

To and from which other email providers will my emails be encrypted?

A secure connection between two email servers occurs automatically and protects unencrypted mail from unauthorised access. As the user, you don’t have to do anything, all this happens in the background. You can see afterwards in the source text whether the email transport was encrypted.

We regularly undertake tests and the providers that offer automatic encryption are listed here:

TLS    DANE
Arcor yes no
AOL yes no
Bund.de yes yes
Comcast yes yes
Freenet yes yes
Gmail yes no
GMX yes yes
Kabel Deutschland   yes yes
O2 yes no
Outlook.com yes no
Riseup yes yes
T-Online yes no
Unitymedia yes yes
Vodafone yes yes
web.de yes yes
Yahoo yes no

(As of 25th March 2020)