Hi,
I've done some searching on the forum, this problem ist discussed a few times but without any solution. So I give it a new try.
On a Sophos UTM V 9.352-6 I want to sign/decrypt outgoing mails. I use a StartSSL Cert and all seems to be well configured.
If I send just a plain e-mail the UTM signs the outgoing mail, no problem occurs. On the recepient side everything look fine
If I send the same e-mail with an attachment, e.g. a word document or a picture, the remote end says that the signature is invalid as the content has been changed. This has been testet with thunderbird and outlook.
I already tested with Parameters 'inline, noconversion', !inline unicode conversion' and 'MIME Part': always the same problem.
I hope that there is a solution for that phenomenon or someone with a working configuration could help.
Cheers Gert
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