[afnog] Help my mail problem

[David Chima]

Brian,
Yes some messages are being properly relayed to existing e-mail addresses with valid 
reasons. I followed some message IDs and I was able to see some reasons why certain 
messages bounced. Some say Domain does not exist (receipient domain) which is true.

Moving to a latest(modern) MTAs is easy but its just an administrative issue here. I have 
tested Postfix and has been handy for me. I will try Exim again.

Regards

David

On 7 Sep 2005 at 12:07, Brian Candler wrote:

> On Wed, Sep 07, 2005 at 11:57:07AM +0200, David Chima wrote:
> > Brian
> > No I don't see the to=<> in the logs, but I get them as sent to the postmaster
> 
> Really - sendmail's logging is that bad? Are you sure there's not another
> line somewhere else which has the same queue ID that you can link it with?
> 
> As a guess, they might be double bounces. That is:
> 
> - spammer sends mail from forged at forgedomain.com to user at yourdomain.com
> - sendmail accepts the mail, not rejecting with 5xx
> - however it can't deliver it (e.g. user at yourdomain.com is over quota,
>   procmail filter fails)
> - sendmail tries to send bounce from <> to forged at forgeddomain.com
> - the bounce is rejected
> - sendmail sends the double bounce to postmaster
> 
> I'm not sure if sendmail does send double bounces to postmaster (I know
> qmail does).
> 
> To be honest though, if sendmail is giving you grief, install a decent
> modern MTA with proper logging and policy control, such as exim.
> 
> Regards,
> 
> Brian.