Spam & Mail Forwarding

Hello,
I wrote a mail forwarding service, something like bigfoot.com where you
get a virtual email adderss (something at myserver.com) and it fwd's
the mail to your real address.
Therefore I am sending mail behalf of other domain users.

First I had problems mails recognized as spam because of SPF where my
domain wasn't allowed to send mail.
So I learned the VERP trick where you set the Return-Path to
myserver.com and you handle bounces yourself.

My problem now is when users send mail to themselves. When (user at
someIsp.com) sends mail to (user at myserver.com) and that message is
fwd'd to himself (user at someIsp.com) - it is marked as spam. I guess
the receiving someIsp.com server checks if that mail was really sent to
him.

Is there any solution for that?

Re: Spam & Mail Forwarding

In news:1165863484.995470.63850@80g2000cwy.googlegroups.com,
yonido@gmail.com wrote:

> My problem now is when users send mail to themselves. When (user at
> someIsp.com) sends mail to (user at myserver.com) and that message is
> fwd'd to himself (user at someIsp.com) - it is marked as spam. I guess
> the receiving someIsp.com server checks if that mail was really sent
> to him.
>
> Is there any solution for that?

Yes -- STOP SENDING SPAM!!

Re: Spam & Mail Forwarding

What?!
I am not sending spam, This is a mail forwarding service.

Re: Spam & Mail Forwarding

> I am not sending spam, This is a mail forwarding service.

Be VERY careful with a mail forwarding service. You will likely have to run
something like spamassassin on mail coming through, otherwise you may
unknowingly forward spam to the final recipients.

If this happens, it will appear that YOU are the source of spam. It may not
be true but that's what others will think, because the headers will show
that your IP address has relayed spam on to them (the victim). This is why
it's important to do spam filtering yourself on the incoming mail.

I know for example ieee.org does a good job of this; they offer email
aliases for their members so they forward on to a destination address.
However they do spam filtering so they will not forward everything.

--
Jem Berkes
www.sysdesign.ca

Re: Spam & Mail Forwarding

In news:1165866798.835798.128740@79g2000cws.googlegroups.com,
inaalabuk@gmail.com wrote:

> I am not sending spam, This is a mail forwarding service.

That's right, a SPAM-forwarding service.

Re: Spam & Mail Forwarding

On Mon, 11 Dec 2006, Jem Berkes wrote:

JB>
JB> If this happens, it will appear that YOU are the source of spam. It may not
JB> be true but that's what others will think, because the headers will show
JB> that your IP address has relayed spam on to them (the victim). This is why
JB> it's important to do spam filtering yourself on the incoming mail.
JB>

It somewhat defeats the object of a forwarding service if you do not
forward everything. But you are correct in thinking that others will
incorrectly label the forwarder as a source of spam. The forums at the
forwarder I used to use years ago were alway full of this problem,
together with notes from the forwarder's staff that they were trying to
sort it out.

I revisited the forums recently and the same old problems were still
there.

So forwarding is not really a viable option IMHO.

--
Alan

( If replying by mail, please note that all "sardines" are canned.
There is also a password autoresponder but, unless this a very
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