This is the current implementation of "reject" footer messages.
Wietse
smtpd_reject_contact_information (default: empty)
Optional contact information that is appended after each SMTP server
4XX or 5XX response.
Example:
/etc/postfix/main.cf:
smtpd_reject_contact_information = For assistance, call 800-555-0101.
Please provide the following information in your problem report:
time ($localtime) and client address ($client_address).
Server response:
550-5.5.1 <u...@example> Recipient address rejected: User unknown
550 5.5.1 For assistance, call 800-555-0101. Please provide the
following information in your problem report: time (Jan 4 15:42:00)
and client address (192.168.1.248).
Note: this text is meant to make it easier to find the Postfix logfile
records for a failed SMTP session. The text itself is not logged to the
Postfix server's maillog file.
Be sure to keep the text as short as possible. Long text may be trun-
cated before it is logged in the senders maillog file, or before it is
returned to the sender in a delivery status notification.
This feature supports a limited number of $name attributes in the con-
tact text. These are replaced by their current value for the SMTP ses-
sion:
client_address
Client IP address
client_port
Client TCP port
localtime
Server local time (Mmm dd hh:mm:ss)
recipient
The address in the RCPT TO command
sender The address in the MAIL FROM command
This feature supports \n as a request for a line break in the contact
text. Postfix automatically inserts after each line break the three-
digit SMTP reply code (and optional enhanced status code) from the
original Postfix reject message.
This feature is available in Postfix 2.8 and later.
