What is the difference between RFC 5321 and RFC 5322?
What are the SMTP and MIME standards?
What is the difference between a MIME content type and a MIME transfer encoding?
Briefly explain base64 encoding.
Why is base64 conversion useful for an e-mail application?
What is S/MIME?
What are the four principal services provided by S/MIME?
What is the utility of a detached signature?
What is DKIM?