There is no error message only the Bounce, only the Bounce from a location with mailscanner c ontains these extra lines.
Thread-Index: AceoLmQUHtaDdIiKRoiurJpVQFa9ZQ==
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.3959
Content-type: multipart/mixed; boundary="----------=_1181129127-16503-1"
MIME-Version: 1.0
X-cartechnics_nl-MailScanner-Information: Please contact the ISP for more information
X-cartechnics_nl-MailScanner: Found to be clean
X-cartechnics_nl-MailScanner-MCPCheck:
X-cartechnics_nl-MailScanner-SpamCheck: not spam, SpamAssassin (not cached,
score=1.744, required 4.3, ALL_TRUSTED -1.80, BAYES_20 -0.74,
MISSING_SUBJECT 1.82, OBSCURED_EMAIL 2.10, UPPERCASE_50_75 0.37)
X-cartechnics_nl-MailScanner-SpamScore: s
X-cartechnics_nl-MailScanner-From:
X-Spam-Status: No
X-Virus-Scanned: by amavisd-new