Hey Daryl, et al, I've just discovered something rather interesting after I enabled the msa_networks feature in local.cf. What's happening is this:
1/ spam arrives at the sendmail box from someone who has used a non-existent email address in our domain 2/ spamassassin clearly marks this as spam, sendmail adds the necessary headers, modifies the subject and relays to exchange 3/ if exchange is configured to send a copy of received email to an external account OR the message is destined for a non-existent mailbox, exchange will initiate a connection with sendmail either for forwarding mail or for NDR 4/ since the exchange box is now trusted via msa_networks, the email receives a clean bill of health from spamassassin and sendmail proceeds to remove the headers previously added for the incoming message except for the subject line which is left with the previously changed header! How can I tell sendmail milter not to remove any of the headers as the email message is really still spam??? Although we could drop all spam and forget about this whole issue, company policy dictates that any email destined to an existing recipient mailbox will be delivered be it spam or not (false positives in the past have left many weary of lost email)! Cheers, AK.
