After upgrade V7->V8 some recipients cannot read signed (not encrypted) emails in Outlook 2003.
Since _all_ emails from users defined in "Mail Security->Email encryption->Intern users" are automatically signed, i have looked for workaround.
I have found this link:
A signed e-mail with the following structure works fine in both Outlook 2003 and Outlook 2007:
multipart/signed
- multipart/alternative
-- text/html
-- text/plain
- application/pkcs7-signature
A signed e-mail with the following structure also works fine in both Outlook 2003 and Outlook 2007:
multipart/signed
- text/html
- application/pkcs7-signature
However, an e-mail with the following structure does not work in Outlook 2003 (it works in Outlook 2007 though):
multipart/signed
- multipart/alternative
-- text/html
- application/pkcs7-signature
I made some tests.
With plaintext emails it works just fine, struktur:
multipart/signed
- text/plain
- application/x-pkcs7-signature
With HTML messages it does not work in Outlook 2003, struktur:
multipart/signed
- multipart/mixed
- multipart/alternative
-text/plain
-text/html
-application/x-pkcs7-signature
In V7 it worked just fine, since upgrade to V8 not more.
Unfortunately, we already upgraded all our Astaros to V8, so i cannot test V7.
Hope, it helps somebody [:)]
Greetz
Vod
P.S. Can somebody test the strukture of signed, not encrypted Email in V7 and post results here?
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