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Faizan
Simple eMail Transfer Protocol (SMTP) is an email delivery standard. It is the primary standard used to send emails. Most email servers allow clients to use the SMTP standard to send email yet may have additional security requirements.
History
Mail-delivery protocols began in the 1960s and continued to become more standardized as the number of hosts grew. SMTP was defined by Jon Postel in 1982 in the publication "RFC821." The current widely used standards are still essentially the same. Although many changes have been proposed to enhance security, the difficulties of implementing new standards universally have stopped changes from catching on.
Function
SMTP is the standard used to send emails from email clients on personal computers. It is commonly used in conjunction with POP or IMAP servers, which recieve mail. Most email clients, including Outlook, Entourage and Thunderbird, allow the use of SMTP.
Features
By default, SMTP uses plain ASCII text to communicate with a mail server on Port 25. SMTP servers can use secure-sockets layer connections for additional security. Some SMTP servers also require authentication with a user name and password.
Expert Insight
The lack of restrictions required for SMTP connections makes it possible to create emails with false information through a DOS command prompt. These can still be traced by authorities but can appear to come from incorrect sources. This is one reason spam emails are so prevalent.
Warning
Some Internet service providers block Port 25 to prevent spam and only allow their own SMTP servers to be used on their networks. In such cases, SMTP servers using other ports may still work, or the provider may allow the port to be opened upon request.
History
Mail-delivery protocols began in the 1960s and continued to become more standardized as the number of hosts grew. SMTP was defined by Jon Postel in 1982 in the publication "RFC821." The current widely used standards are still essentially the same. Although many changes have been proposed to enhance security, the difficulties of implementing new standards universally have stopped changes from catching on.
Function
SMTP is the standard used to send emails from email clients on personal computers. It is commonly used in conjunction with POP or IMAP servers, which recieve mail. Most email clients, including Outlook, Entourage and Thunderbird, allow the use of SMTP.
Features
| What Is SMTP Server |
Expert Insight
The lack of restrictions required for SMTP connections makes it possible to create emails with false information through a DOS command prompt. These can still be traced by authorities but can appear to come from incorrect sources. This is one reason spam emails are so prevalent.
Warning
Some Internet service providers block Port 25 to prevent spam and only allow their own SMTP servers to be used on their networks. In such cases, SMTP servers using other ports may still work, or the provider may allow the port to be opened upon request.
Posted in: email
