-----Original Message-----
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Ralf Hildebrandt
Sent: Wednesday, April 18, 2012 2:08 PM
To: postfix-users@postfix.org
Subject: Re: redirect null sender

* Amira Othman <a.oth...@cairosource.com>:
> 
> * Amira Othman <a.oth...@cairosource.com>:
> > Hi all
> > 
> >  
> > 
> > I am building system that will send mails to list of users but I need to
> > stop receiving error emails or redirect them to another account or
> > /dev/null. I know it is bad idea but the application I am using will  handle
> > bounce mails so I don't need error email to  be sent to the end user . 
> 
> If your application is handling bounce mails, why not send those
> to the application then? Otherwise it cannot handle them, can it?
> 
> 
> I don't know how to redirect them to because it's not in the format
> user@domain it's null sender.
the SENDER is null
the recipient is ???

> where can I add this if it's possible?

The bounce goes back to the original sender. The usual way is this:

When sending mail to ralf.hildebra...@charite.de, on would set the
sender to:

nameoflist-bounces+ralf.hildebrandt=charite...@sending.domain.com

So, if mail to "ralf.hildebra...@charite.de" bounces, it goes back to 
"nameoflist-bounces+ralf.hildebrandt=charite...@sending.domain.com",
and by converting "nameoflist-bounces+ralf.hildebrandt=charite.de"
back to "ralf.hildebra...@charite.de" the app knows which address
bounced.

But the original sender will not be user on my mail server .it will be any 
client that sends mail through application. I don't want client to receive 
bounces. How can I do that? 

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