Write a few words about Email threats briefly and & Answer in brief for below 1 What is the difference between RFC 5321 and RFC 5322? 2 What are the SMTP and MIME standards? 3 What is the differenc

Write a few words about Email threats briefly and & Answer in brief for below 1 What is the difference between RFC 5321 and RFC 5322? 2 What are the SMTP and MIME standards? 3 What is the difference between a MIME content type and a MIME transfer encoding? 4 Briefly explain base64 encoding. 5 Why is base64 conversion useful for an e-mail application? 6 What is S/MIME? 7 What are the four principal services provided by S/MIME? 8 What is the utility of a detached signature? 9 What is DKIM?