I agree with Gergely, this is just too specific for your local system 
and could be solved with existing rules already.

If you want to help your users, create default rules that work with 
your system.

This would work but it requires two steps in two different places. 
Most people will not recognize the potential for this problem until it 
is too late (eg they have returned from holiday and there mailbox is 
full junk). In my opinion, the issue should be dealt with in the 
vacation form.
I agree that the implementation could be done better. I think it 
should be implemented with configurable spam headers. I wasn't sure 
how to implement this properly.



There is no reason I can see it could not be implemented with the 
other backends as well.



Perhaps a better place to implement this feature would be in the "Do 
not send responses to bulk or list messages"  checkbox. Changing it to 
"Do not send responses to bulk,list messages or spam".

I think the user should insert a spam rule than, which puts the letter 
to spam box (or to inbox, if she wants) and check the 'ignore other 
rules' option.



This way she got the hoped functionality without a patch.  Am I good?



If it is not trivial for endusers, then the horde project should 
documentate it, I think, but shouldn't apply a sieve only non-abstract 
patch with non-conigurable spam headers.



Gergely

So you can add a patch. Didn't see this first time around.

I find it kind of annoying when you go on vacation and when I return I

find my inbox is full of those MAILER-DAEMON messages that are the

result of the vacation program replying to spam messages.



I've created a fix but this trouble ticketing system doesn't allow one 
to attach a patch so there you go.