Definitions for "ETRN"
Keywords:  smtp, queue, rfc, esmtp, timeout
ETRN (Extended Turn) is an extension to the Simple Mail Transfer Protocol (Simple Mail Transfer Protocol) that allows an SMTP server to send a request to another SMTP server to send any email messages it has.
An SMTP command enabling a client to request that the server start the processing of its mail queues for messages that are waiting at the server for the client machine. Defined in RFC 1985.
An ESMTP service extension for starting a remote message queue, such as for mail servers that are normally not connected to the Internet. RFC 1985
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