Mail Server

2115
Electronic Mail in the Internet
Electronic Mail in the Internet

Electronic mail has been around since the beginning of the Internet. It was the most popular application when the Internet was in its infancy [Segaller 1998], and has become more and more complicated and powerful over the years. It remains one of the Internet's most important

Tags user agent, mail server, mailbox, message queue, electronic mail
2352
SMTP
SMTP

SMTP, defined in RFC 5321, is at the heart of Internet electronic mail. As mentioned above, SMTP transfers messages from senders mail servers to the recipients mail servers. SMTP is much older than HTTP. (The original SMTP RFC dates back to 1982, and SMTP was around long

Tags smtp, http, tcp connection, mail server
1251
Comparison with HTTP / MaiI Message Formats
Comparison with HTTP / MaiI Message Formats

Let's now compare SMTP with HTTP in brief. Both protocols are used to transfer files from one host to another: HTTP transfers files (also called objects) from a Web server to a Web client (typically a browser); SMTP transfers files (that is, e-mail messages) from one mail server

Tags pull protocol, push protocol, peripheral information, http, smtp, mail server
2366
Mail Access Protocols
Mail Access Protocols

Once SMTP delivers the message from Alice's mail server to Bob's mail server, the message is placed in Bob's mailbox. Throughout this discussion we have tacitly assumed that Bob reads his mail by logging onto the server host and then executing a mail reader that runs on

Tags mail server, smtp, http protocol, imap protocol
2526
DNS Records and Messages
DNS Records and Messages

The DNS servers that collectively implement the DNS distributed database store resource records (RRs), including RRs that provide hostname-to-IP address mappings. Each DNS reply message carries one or more resource records. In this and the following subsection, we

Tags resource records, dns servers, hostname, dns messages, mail server, nslookup program
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