Issuance Tech - Let's Encrypt community...encryption - How secure is POP/IMAP/SMTP.

How to protect the email that's sent?I'm new to this SMTP and got confused between email encryption and server authentication.

I can't find an example of a mail being sent in a format that is secure.

My case is that I have an SMTP server.The email message has to be sent in a secure format.

Is it possible to send an email without a server?Please let me go.

I don't know if I'm missing something here.There is a package used here.I'm free to switch to another package if it supports mail encryption.

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