Adding mail header if postfix DNS based RBL (realtime black hole) check fails

Question

Hello,

I have setup a receiving Postfix mail server. Here i have custom code written that parses the whole mail received by postfix and use the headers, body and attachments separately for different uses.

I have currently added SPF and DKIM checks in postfix that result in appending of their results in the mail header to indicate about the character of the mail.

Also i am planning to implement postfix anti-UCE features using DNS based Real time black hole lists (DNSRBL), for this i have added the following:

'smtpd_recipient_restrictions = reject_rbl_client zen.spamhaus.org, reject_rbl_client bl.spamcop.net'

in my Postfix's main.cf file.

My question is, how can I append the results of this check inside the mail headers that are being received?

Thanks in advance!!!

Ashish

Answer 1

This is not possible, as per Postfix mailing list discussion you can not do so.