ETRN Meaning and
Definition
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ETRN stands for "Extended Turn" or "Extended Timeout Response Notification." It is a technical term associated with the email delivery protocol for managing email message queues and ensuring reliable message delivery. ETRN is used in the Simple Mail Transfer Protocol (SMTP), which is responsible for sending and receiving emails over a network.
In the context of ETRN, when a mail server is temporarily unable to receive incoming email messages due to being overloaded or not being connected to the internet, it can issue an ETRN command to the sending mail server. This command notifies the sending server that it should defer sending any further email messages to the recipient's domain until the receiving server is ready to handle incoming mails.
Upon receiving an ETRN command, the sending mail server will pause or extend the timeout period for sending email messages to the recipient's domain. The sending server will continue to attempt delivery at predetermined intervals until it receives a notification from the recipient's server that it is ready to resume accepting messages. This helps prevent the sending server from constantly retrying delivery, conserving network resources and reducing the burden on the recipient's server.
Overall, ETRN is a protocol feature that allows the synchronization of email message delivery between mail servers, ensuring efficient and reliable communication in email systems.
Common Misspellings for ETRN
- tern
- wtrn
- strn
- rtrn
- 4trn
- 3trn
- e6rn
- et5n
- et4n
- wetrn
- ewtrn
- setrn
- edtrn
- retrn
- 4etrn
- e4trn
- 3etrn
- e3trn
- eytrn
- etyrn
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