When you connect to your email through a mail client, or send emails, you are connecting to your domain through mail.your-domain.com.
Your SSL certificate is associated with the generic address (www.your-domain.com) and therefore brings up a warning when you connect to mail.your-domain.com.
Your connection will be successful, the SSL certificate will encrypt your connection, and you can ignore the warning.
However, if you want to prevent this warning from appearing, your mail client should have the option to accept the certificate permanently despite the warning.
Article ID: 259
Created On: Fri, Mar 13, 2015 at 11:51 AM
Last Updated On: Thu, Apr 23, 2015 at 11:38 AM
Online URL: https://www.heartinternet.uk/support/article/why-do-i-see-an-ssl-warning-when-connecting-to-my-mailbox-or-sending-emails-with-a-mail-client.html