1System Administration Commands etrn(1M) 2 3 4NAME 5 etrn - start mail queue run 6 7SYNOPSIS 8 etrn [-v] server-host [client-hosts] 9 10DESCRIPTION 11 SMTP's ETRN command allows an SMTP client and server to 12 interact, giving the server an opportunity to start the pro� 13 cessing of its queues for messages to go to a given host. 14 This is meant to be used in start-up conditions, as well as 15 for mail nodes that have transient connections to their ser� 16 vice providers. 17 18 The etrn utility initiates an SMTP session with the host 19 server-host and sends one or more ETRN commands as follows: 20 If no client-hosts are specified, etrn looks up every host 21 name for which sendmail(1M) accepts email and, for each 22 name, sends an ETRN command with that name as the argument. 23 If any client-hosts are specified, etrn uses each of these 24 as arguments for successive ETRN commands. 25 26OPTIONS 27 The following option is supported: 28 29 -v The normal mode of operation for etrn is to do all of 30 its work silently. The -v option makes it verbose, 31 which causes etrn to display its conversations with 32 the remote SMTP server. 33 34ENVIRONMENT 35 No environment variables are used. 36 37FILES 38 /etc/mail/sendmail.cf 39 sendmail configuration file 40 41SEE ALSO 42 sendmail(1M), RFC 1985. 43 44CAVEATS 45 Not all SMTP servers support ETRN. 46 47CREDITS 48 Leveraged from David Muir Sharnoff's expn.pl script. Chris� 49 tian von Roques added support for args and fixed a couple of 50 bugs. 51 52AVAILABILITY 53 The latest version of etrn is available in the contrib 54 directory of the sendmail distribution through anonymous ftp 55 at ftp://ftp.sendmail.org/ucb/src/sendmail/. 56 57AUTHOR 58 John T. Beck <john@beck.org> 59