Re: [exim] Problem with Barracuda Networks

On Thu, 2010-07-08 at 13:16 +0800, Emmanuel Noobadmin wrote:
> I have a problem with Barracuda Networks blocking various dynamically
> assigned IP addresses that my clients have the misfortune to be
> assigned to every few weeks or so.
<snip>

If your clients have dynamically assigned IPs which change periodically,
then they should be sending all mail out via a fixed smarthost.

Of course, that doesn't prevent people who switch on features they don't
understand from rejecting your client's emails.

To answer your question: yes, you can remove any header in Exim and
replace it with anything you want. Amending the Received: headers is not
at all advisable as there is a set format for them. If you want to
"hide" the originating IP address, then removing all the Received:
headers is the way to go, perhaps adding an "X" header (say
X-MyDomain-Track:) with something in it that you understand, like the
message-id or the hash you previously mentioned.

Graeme