Port 465 not working on send over SMTP

[SMTP] Cannot send message (Sending email “” failed with error: Email recipient not accepted by the server.)
This started happening with version 9 I believe. I am on 9.2.2157 (5b49542). Nothing has changed on my part. Only going to Version 9.

As the error says, your server won’t accept the recipient’s address. It doesn’t have anything to do with the version of eM Client, or the port you are using. It is probably just an error in the email address you sent the message to.

You will find the message in the Local Folder Outbox. If Local Folders are not visible below your other folders, you can enable them by selecting Menu > Settings > General > General > Show Local Folders. Click on Save & Close to save the setting.

Check the recipient address. Common errors are a space in the address, or an extra dot at the end after the com.