The following is an example SMTP session that shows how an SMTP
client requests the ETRN service. Client commands are shown in bold
font.
220 my.server.tld ESMTP Postfix
helo my.client.tld
250 Ok
etrn some.customer.domain
250 Queuing started
quit
221 Bye
As mentioned in the introduction, the mail is delivered by
connecting to the customer's SMTP server; it is not sent over
the connection that was used to send the ETRN command.
The Postfix operator can request delivery for a specific customer
by using the command "sendmail -qRdestination" and, with
Postfix version 1.1 and later, "postqueue -sdestination".
