Change envelope sender for forwarded messages?

John Wilcock john at
Tue Mar 24 17:10:45 GMT 2009

I'm trying to set up selective forwarding to an external account to 
enable my boss to receive mail on her mobile phone. Her key requirement 
is that the original sender mustn't be aware that the forwarding is 
happening, and in particular must not receive a nondelivery notice even 
if her external mailbox is full.

In other words, I need to change the envelope sender on forwarded 
messages. I've tried various solutions, including a forward action in a 
ruleset on Non Spam Actions, but the original envelope sender is unchanged.

I'm open to all suggestions, in MailScanner or elsewhere on the server 
(running postfix and dovecot). I've also tried postfix's 
recipient_bcc_maps or a redirect action in a dovecot deliver LDA sieve 
filter, but in all cases the envelope sender is used unchanged and I 
can't see any way to rewrite it.

Any suggestions?


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