How to change post fix return path

Good day

I am running a mail server with postfix but my clients who uses the SBS 2008
pop3 connector are having problems when they send a read/delivery request in
their e-mails. The SBS event viewer says because of invalid headers the pop3
connector could not download the e-mails.

I checked on web-mail and saw that the e-mails that cannot be downloaded
have the return path set to mailer daemon. How can I change the return path
on the e-mails that sent back as a delivery/read notification to the
original sender.

regards
 *Paddington Chidziva*
Systems Engineer
 [image: snowball] <http://www.snowball.co.za/> tel: +27 (0)21 880 2228
fax: +27 (0)21 880 2229 cell: +27 (0)74 780 7025
 email: paddington@snowball.co.za web: www.snowball.co.za
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