intro-network3
POP before SMTP/APOP before SMTP
Email authentication (POPS before SMTPS) In APOP before SMTP, the password used for authentication was encrypt […]
E-mail (restricted by domain, linked with blacklist)
Email (restrict by domain) In e-mail, the part after @ represents the domain name. By specifying this do […]
E-mail (S/MIME and PGP) and mail relay problems
Email (S/MIME and PGP) S/MIME (Secure/Multipurpose Internet Mail Extensions) and PGP (Pretty Good Privacy) ar […]
Public Key Cryptosystem
What is public key cryptography? In public key cryptography, a pair of keys, a private key and a public key, i […]
Common Key Cryptosystem
What is public key cryptography? In public key cryptography, a pair of keys, a private key and a public key, i […]
What is MIME? E-mail encryption and electronic signature
What is MIME Although e-mail is now a service that everyone uses, e-mail itself has a long history, dating ba […]
What are POP3 and IMAP4?
What is POP3 While SMTP is a protocol for exchanging mail servers, POP (Post Office Protocol) is a protocol t […]
How email works and how to read email headers
How email works Here, we will explain the flow from sending to receiving an e-mail. (1) The sending client (MU […]
SMTP header information
SMTP header information The email contains header information. Why do you need header information other t […]
What is email
What is email Electronic mail, also known as e-mail or e-mail, is a system for exchanging messages using elec […]