Re: Faulty bounces are "confirming" spam

On Wed, May 05, 2004 at 12:52:01PM -0400, Chris Johnson wrote:
> A spam or so a day has been getting past qconfirm recently. It happens
> when someone sends spam with an address that has a valid domain but an
> invalid user name, and the mail exchanger for that domain bounces the
> confirmation message to the address in the From header rather than the
> envelope address. This "confirms" the message, and the spam ends up in
> my inbox.
> 
> Would it make sense to ignore confirmations that have an empty
> envelope sender?  Would it break anything?

Unfortunately there's no standard defined as far as I know, let alone
agreed upon, on how a delivery confirmation message must look like.  So
you cannot be sure I think.

Regards, Gerrit.