- Plesk for Windows
- Plesk for Linux
When connecting to a mailbox email@example.com using a mail client the following warning is shown:
CONFIG_TEXT: The certificate for this server is invalid
CONFIG_TEXT: certificate belongs to a different site, which could mean that someone is trying to impersonate this site
CONFIG_TEXT: The target principal name is incorrect
The error shows that the certificate from the error belongs to serverhostname.com.
Certificate in Tools & Settings > SSL/TLS Certificates > Certificate for securing mail is set to serverhostname.com
Incorrect configuration of the mail client.
Configure a mail client following the article Configure mail client for secure connection