This article will detail the process of configuring and securing a Let’s Encrypt Certificate for your Plesk Hosted Email Service.
1. Login to Plesk.
2. Navigate to SSL/TLS Certificates as shown below.
3. Select Reissue Certificate.
4. Tick Assign the certificate to mail domain. If you would like to secure your Webmail client and the www record, tick those boxes as well.
If you would like to secure any additional sub-domains, you may wish to issue a Wildcard Certificate.
When ready to proceed, select Get it free.
You have successfully issued a Let’s Encrypt Certificate for your Plesk Hosted Email Service. You will now be able to use your domain as the incoming and outgoing mail server.
Example Incoming/Outgoing Mail Server: