I've created a custom header and I'm trying to set its value to something like username::domain:servername. For example, messages from user@mydomain.com using myserver as the MTA should generate a header value of user::mydomain.com.:myserver.
I've put this in my sendmail.cf:
LOCAL_CONFIG
HFeedback-ID: ${mail_addr}::${mail_host}:$w
However when I see the emails that were sent this header looks like this:
Feedback-ID: user:::myserver
For some reason the ${mail_host} macro seems to be returning an empty value. Should I be using a different macro? How can I accomplish this?
Thank you!
