I checked the official documentation for Amazon Simple Email Service Classic but I can find an answer for my question which connection type I can use SSL encryption in order to encrypt the e-mail content:
The only solution for now is to use API request but in this case I don't see option to send web e-mail.
Can you guide me how I can solve this question?
To work with SES, look at using the SES Java V2 API. You can find examples here:
(At this point, the SES guide does not have the latest Java examples in it. You need to look at the Java V2 DEV Guide)
Notice the SendMessage example, which makes use of the Java Mail APIs. There are different libs you can use to encrypt email used with Java MAIL API. For information, see this content.
https://www.geeksforgeeks.org/sending-email-java-ssltls-authentication/