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!!!