Change Headers That Exchange Uses To Deliver Mail?

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

From: B.Gordon (dbgordon_at_sympatico.ca)
Date: 03/04/05 

Date: Fri, 4 Mar 2005 12:14:10 -0500

When someone sends a BCC mail to recipients in my domain, the TO: header
field is blank and as a result, the message is getting dumped into my
badmail and a copy is going to the postmaster in my domain.

It turns out that our ISP has some kind of SPAM filter that parses the BCC
content prior to delivery to me and places the intended recipients in a new
header called:

X-NETSCAN-TO:

Is there a way to tell my exchange server to use the contents of that new
header to determine the recipients in addition to the normal TO: header
which works the rest of the time?

So, have it check TO: and X-NETSCAN-TO: to find an internal match to our
mailboxes?

I cannot get our ISP to turn off this spamguard feature and I cannot get our
sender of this particular email to use anything other than BCC to send this
message... So I need to configure my server to deal with this issue.

Any help would be appreciated...

Relevant Pages

  • Re: BCC revealer
    ... The *fields* shown in the UI for your e-mail client have nothing to do ... all recipients specified in the To, Cc, and Bcc *fields* displayed in ... Using this list of recipients, your e-mail client then issues a ... was never copied to a Bcc header in the message, ...
    (microsoft.public.outlook.general)
  • Re: Bcc
    ... your "newsletters" and it is inserting the Bcc header. ... The mail server cannot do anything about a client program ... The list of recipients specified by ...
    (microsoft.public.outlook.general)
  • Re: Can a Bcc recipient use "Reply all"
    ... > don't want Bcc recipients to see each other. ... The recipient never gets the e-mail address of those you put in the Bcc ... It never gets included as a header (well, ... of RCPT commands it sends to the SMTP server. ...
    (microsoft.public.outlook.general)
  • Re: Disclosure of BCC field
    ... I do not believe that it is Sendmail doing this. ... or Bcc:) in the message to action: none leaves the message ... envelope recipients, add-bcc adds an empty Bcc: ... Is this header information introduced at the sender's side sendmail ...
    (comp.mail.sendmail)
  • Re: How did I get this message?
    ... I wondered if it could be that, but thought the bcc: ... >> This has happened for some time where one of our users receives some spam ... >> only reference to our domain in the header is that our exchange server ... >> I can't figure out why these messages get to the recipients, ...
    (microsoft.public.exchange.misc)