Re: [exim] E-mail forwarders

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Author: Dave Evans
Date:  
To: exim-users
Subject: Re: [exim] E-mail forwarders
On Tue, May 19, 2009 at 11:08:24AM -0600, Sevenlight Webmaster wrote:
> The issue I am experiencing is that many of my clients have e-mail
> forwarders setup for their domains. My server will receive an e-mail
> message, then redirect it to their forwarded e-mail address. What has
> happened quite often is that their forwarded e-mail address is
> filtered by Barracuda servers. If the original message is then
> detected as spam by their Barracuda servers, *my* server is then
> flagged as a source of spam, which eventually causes all e-mails sent
> my any of my clients to be filtered/blocked by any Barracuda servers.


Well, are the blocked messages spam?

Ultimately what the Barracuda servers do with incoming messages is a matter
for the administrators of those servers - presumably in co-operation with
their clients.

If the users of the Barracuda servers are unhappy with the operation of that
server, they should take it up with the administrators of that server.
Depends what those users want - do they want to accept /all/ messages forward
via you (spam or not), or do they want to reject the spam and accept the rest,
or something else?

It sounds to me as though you're probably doing all the right things already,
with the caveat that forwarding between non co-operating systems can be
problematic.

> My question is basically this: is there any way to prevent this?
> Whether it is somehow "silently" redirecting the message (without
> leaving any record that my server touched it), or some other way of
> basically not having my server appearing to be the spam source?


Assuming that the emails /originate/ somewhere other than your server, then
you can't hide the fact that the emails will be seen to come from your IP
address.

--
Dave Evans
http://djce.org.uk/
http://djce.org.uk/pgpkey