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Re: Change error messages returned by Postfix
From: Wietse Venema <wietse_at_nospam>Date: Tue Jan 04 2011 - 21:09:04 GMT
To: Postfix users <postfix-users@postfix.org>
Wietse Venema:
> > > So this would change the feature to:
> > >
> > > smtpd_reject_contact_information =
> > > For assistance, call 800-555-0101 (pid=$pid, client=$client_addr)
> > >
> > > The result would look like:
> > >
> > > 554-5.5.1 <user@example>: Recipient address reject: User unknown
> > > 554 5.5.1 For assistance, call 800-555-0101 (pid=7283, client=192.168.1.248)
> > >
> > > The helpdesk person then looks for "[7283]" and "192.168.1.248" in
> > > the maillog file. This would lift some, but not all, of the mystery
> > > with commands that Postfix rejects (syntax, etc.) without logging
> > > them.
...
> PID logging isn't useful with postscreen(8) because there is only
> one process, so I'll add a localtime attribute. The rfc822_date
> string seems too long to be useful; we need something that people
> can use in a phone call.
Having implemented $name expansion, I find that it is easy produce
long contact footer text, so I have added multi-line support.
Unfortunately, multi-line footers can be harder to read. For example,
Postfix will word-wrap multi-line replies when it reports delivery
errors in a bounce message.
Suppose we have this nice multi-line contact footer:
554-5.5.1 <user@example>: Recipient address rejected: User unknown
554-5.5.1 For assistance, call 800-555-0101. Please mention the
554-5.5.1 following information in your problem report:
554 5.5.1 localtime=Jan 4 15:42:00, client=192.168.1.248
The logging would look something horrible like:
Jan 4 15:42:00 client postfix/smtp[25100]: B32E0924782:
to=<user@example>, relay=mail.example[192.168.1.58]:25,
delay=0.04, delays=0.01/0/0.01/0.01, dsn=5.1.1, status=bounced
(host mail.example[192.168.1.58] said: 550 554-5.5.1 <user@example>:
Recipient address rejected: User unknown 554-5.5.1 For assistance,
call 800-555-0101. Please mention the 554-5.5.1 following
information in your problem report: 554 5.5.1 localtime=Jan 4
15:42:00, client=192.168.1.248
The bounce message would look like:
<user@example>: host mail.example[192.168.1.58] said: 554-5.5.1
<user@example>: Recipient address rejected: User unknown 554-5.5.1 For
assistance, call 800-555-0101. Please mention the 554-5.5.1 following
information in your problem report: 554 5.5.1 localtime=Jan 4 15:42:00,
client=192.168.1.248
Final-Recipient: rfc822; user@example
Original-Recipient: rfc822; user@example
Action: failed
Status: 5.1.1
Remote-MTA: dns; mail.example
Diagnostic-Code: smtp; 554-5.5.1 <user@example>: Recipient address rejected:
User unknown 554-5.5.1 For assistance, call 800-555-0101. Please mention
the 554-5.5.1 following information in your problem report: 554 5.5.1
localtime=Jan 4 15:42:00, client=192.168.1.248
On the other hand with a single-line contact footer, there would
be no ugly "554-5.5.1" strings messing up the contact footer text:
Server response:
554-5.5.1 <user@example>: Recipient address rejected: User unknown
554 5.5.1 For assistance, call 800-555-0101. Please mention the following information in your problem report: localtime=Jan 4 15:42:00, client=192.168.1.248
The logging remains more readable:
Jan 4 15:42:00 client postfix/smtp[25100]: B32E0924782:
to=<user@example>, relay=mail.example[192.168.1.58]:25,
delay=0.04, delays=0.01/0/0.01/0.01, dsn=5.1.1, status=bounced
(host mail.example[192.168.1.58] said: 550 554-5.5.1 <user@example>:
Recipient address rejected: User unknown 554-5.5.1 For assistance,
call 800-555-0101. Please mention the following information in
your problem report: localtime=Jan 4 15:42:00, client=192.168.1.248
As does the bounce message text:
<user@example>: host mail.example[192.168.1.58] said: 554-5.5.1
<user@example>: Recipient address rejected: User unknown 554 5.1.1 For
assistance, call 800-555-0101. Please mention the following information in
your problem report: localtime=Jan 4 15:42:00, client=192.168.1.248
Final-Recipient: rfc822; user@example
Original-Recipient: rfc822; user@example
Action: failed
Status: 5.1.1
Remote-MTA: dns; mail.example
Diagnostic-Code: smtp; 554-5.5.1 <user@example>: Recipient address rejected:
User unknown 554 5.1.1 For assistance, call 800-555-0101. Please mention
the following information in your problem report: localtime=Jan 4 15:42:00,
client=192.168.1.248
Wietse