The Certificates dialog
The Certificates dialog shows you the list of trusted certificates. After AY Mail installation, the list contains certificates of well known certification authorities, such as VeriSign, Thawte etc. If you want to establish an SSL connection to the server that has a certificate which is signed by a certification authority not listed here, you need to add the corresponding root certificate to this list using the Import button.
Delete button deletes the selected certificate.
Import button lets you import a new certificate into the list.
Export button opens the Certificate is Ready dialog where you can save the certificate as a file or copy it into the clipboard.
A display below the list of certificates shows you information about the highlighted certificate.