Forward = Spoofing?

[HSorgYves]

The log you are refering to should be:

Code:

Sep 23 12:23:26 castor postfix/smtpd[2188]: 31CAB2912C: client=localhost[127.0.0.1]
Sep 23 12:23:26 castor postfix/cleanup[2272]: 31CAB2912C: message-id=<7061C94A-0314-4746-B8BB-595B359E5158@pt.lu>
Sep 23 12:23:26 castor postfix/qmgr[18852]: 31CAB2912C: from=<mailing-bounces@glcr.lu>, size=1765, nrcpt=3 (queue active)
Sep 23 12:23:26 castor postfix/smtp[2306]: 31CAB2912C: to=<georges.kreis@pt.lu>, relay=inmx1.pt.lu[194.154.192.93]:25, delay=0.37, delays=0.11/0.18/0.02/0.06, dsn=2.0.0, status=sent (250 2.0.0 m8NANQDR010302 Message accepted for delivery)
Sep 23 12:23:31 castor postfix/qmgr[18852]: 31CAB2912C: removed

while the non working one is:

Code:

Sep 25 12:03:08 castor postfix/smtpd[13602]: 4D66668061: client=smtpout2.pt.lu[194.154.192.94]
Sep 25 12:03:08 castor postfix/cleanup[13613]: 4D66668061: message-id=<8B9B7F5C-4241-497F-AADB-DC26C2423327@pt.lu>
Sep 25 12:03:08 castor postfix/qmgr[24964]: 4D66668061: from=<georges.kreis@pt.lu>, size=915, nrcpt=1 (queue active)
Sep 25 12:03:08 castor postfix/smtp[13614]: 4D66668061: to=<geokreis@pt.lu>, orig_to=<test@hosting-skills.org>, relay=inmx1.pt.lu[194.154.192.93]:25, delay=8.7, delays=8.5/0.02/0.13/0.01, dsn=5.1.7, status=bounced (host inmx1.pt.lu[194.154.192.93] said: 500 5.1.7 Spoofing denied (in reply to MAIL FROM command))
Sep 25 12:03:08 castor postfix/bounce[13615]: 4D66668061: sender non-delivery notification: 85BBA68065
Sep 25 12:03:08 castor postfix/qmgr[24964]: 4D66668061: removed

The difference seems to be that the listserver sents the mail using from=<mailing-bounces@glcr.lu> while a forward will use the original from=<georges.kreis@pt.lu>.

Can I rewrite these headers on my side for forwards?

Best Regards,
Yves