On 4 Oct 2007, at 0:36, K. Wolf wrote:

> Hi,
> 
> Last weekend I had an example of this happen to one of my backup mail servers.
> When I noticed the problem there were 27,000 NDR type messages it was 
> trying to deliver.
> Mostly all were sent to random [EMAIL PROTECTED] and the mail server 
> was diligently trying sending NDR's to every single one of them - 
> most likely to faked or spoofed addresses.
> I could actually sit and watch more junk flooding in, they appeared 
> to be coming from many compromised hosts so blocking the IP's didn't 
> really help.
> 
> So it would be very useful if Xmail at least had an option so that it 
> does not send all the bounced email messages.
> I realise this may not conform to the RFC's and I realise that not 
> many people may use it, but it would still be a very helpful if the 
> mail-admin found that NDR messages were getting out of hand.
> One or two legitimate senders may not know that their mail was not 
> delivered, but when compared to the type of flood described here its 
> a small price to pay

I can't say I've seen xmail behave as you're seeing.

I was getting lots of bogus bounces incoming from systems that have 
attempted to send from forged valid addresses @lordynet.org to 
invalid addresses and these have correctly been rejected by xmail 
(EAVAIL) but the badly configured remote system then returns a bounce 
email to the rejection back out to the forged sender, also including 
the original spam content. These were more than a little annoying due 
to effort in working out what was happening. It seems to have been 
fixed now.

David

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