I've got a problem with signing messages for users who use Outlook 2003.

I sign the mails (invoices) using openssl_pkcs7_sign with conjunction to
Everyone can see the mail and the signature without an problem.
Only users who use Outlook 2003 (11.8169.8172) SP3, got an error the
signature is wrong.

I have a server with Outlook 2003 (11.5608.5606), and checked there: no

I tried it first with
"/usr/bin/openssl smime -sign -inkey /home/popuser/ssl2/sales.key
-signer /home/popuser/ssl2/sales.cert -from ''
-subject 'Factuur / Invoice' -in test.txt -to
''|/usr/sbin/sendmail -fsales@webservice.be

After the problem I switched to using PEAR:Mime because of the linebreak
problems, but it seems not to help.

Can anyone please advise?

best regards,
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