postfix logs delay, delays, dsn

2 msg	Postfix SASL Help
6 msg	Slowing down postfix
2 msg	need help deciphering a line
4 msg	Postfix SMTP server: errors from something.net[...
4 msg	2.5.0-RC and 2.6 should recognize FreeBSD 8
9 msg	Postfix not following my access file.

postfix logs delay, delays, dsn
\ frank jacottin (22 Jan 2008)
. \ MrC (22 Jan 2008)
. . \ Justin McAleer (22 Jan 2008)

3 msg	Best way to shutdown postfix prior to servicing...
1 msg	the bounce process hangs a mail (?)
3 msg	messages destined for content_filter stuck in d...
2 msg	Domain in username
5 msg	missing authentication on recipient
5 msg	postfixadmin
5 msg	check_policy_service before reject_rbl_client
9 msg	MXBackup via LDAP
5 msg	header and body check exemptions
5 msg	Relay recipient maps and relocated users
4 msg	mail forwarding loop :: SPAM
3 msg	transport_maps how to match mx's
2 msg	Where/when to insert a missing Message-ID

Subject:	postfix logs delay, delays, dsn
Group:	Postfix-users
From:	frank jacottin
Date:	22 Jan 2008

Hello,

A newbie question but I could not find anything meaninful about the
format of the postfix log files.
I'm in particular interested in the meaning of delay (it seems obvious),
delays and dsn. A pointer to any documentation will be appreciated.

ex: Jan 22 19:23:07 cronos postfix/smtp[25635]: A47BFA6C04B:
to=<me>, relay=server.whatever.com[123.xx.xx.xx]:25,
delay=0.59, delays=0.05/0/0.41/0.13, dsn=2.0.0, status=sent (250 +OK
message queued for delivery.)

Thanks,
Frank.