SMTP - 25, 465, and 587 POP - 109, 110, and 995 IMAP - 143, 220, and 993
rfc821 is for SMTP rfc822 is for mail message format..
SMTP (Simple Mail Transfer Protocol) is primarily used for sending and relaying email messages between servers, facilitating the process of email delivery from the sender to the recipient's mail server. In contrast, POP (Post Office Protocol) is utilized by email clients to retrieve emails from the server, allowing users to download their messages for local access. While SMTP handles the outbound communication, POP focuses on the inbound retrieval of emails. Together, they enable the full cycle of email communication.
Because of pop, imap and smtp
If you have a @scicable.com email address the POP & SMTP servers are mail.scicable.comfor @scicable.net addresses it would be mail.scicable.net
SMTP is push protocol, stateful protocol which is used for sending Mails from Client to Client or Server to Server. Generally SMTP uses the encryption method of 7bit or 8bit ISCII but HTTP dose not use that. HTTP is pull protocol which is preferred for sites demand and this is stateless protocol.
SMTP because SMTP handles outgoing mail while Post Office Protocol (POP or POP3) is responsible for incoming mail.
POP
art music is boring pop music
Birla putty is washable and pop is non washable.
SMTP stands for Simple Mail Transfer Protocol. This is the generally accepted protocol for sending e-mail messages between servers; most e-mail systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an e-mail client using either POP or IMAP.
it has different sounds