No indication whether the email is encrypted and signed with S/MIME

Question

I have been using OpenPGP/GPGMail V2.0b6 for email encryption for some time. Now I added S/MIME. What I noticed is that if I send an encrypted and signed email with GPGMail the header in the send mail will show that it was encrypted and signed. However, if I send an encrypted and signed email with S/MIME there is not notification in the mail header. Only be checking the send mail in the iPad was I able to confirm that the email was really encrypted and signed with S/MIME.
Does anybody else have experienced this?
Is there a solution to this problem?

Answer 1

I have now further analysed the behaviour of S/MIME encryption and signitures on the iPad (iOS 7.0.2) and the iMac (OSX 10.8.5).
I installed a Comodo free email certificate on my iMac and the same certificate on my iPad. Another Comodo free email certificate I installed on the iMac of a friend of mine.
Sending back and forth encrypted, signed or both encrypted and signed messages between iMacs and iMac and iPad works with no problem. In the iPad email header it is indicated with symbols wether the email is encrypted, signed or both encrypted and signed. On the iMac on the other hand only when the email is signed is that indicated with a symbol in the email header (see figure below).
When an email is encrypted or encrypted and signed is this not indicated with symbols in the email header. This is in contrast to OpenPGP. OpenPGP emails always indicate with symbols whether they are encrypted, signed or both encrypted and signed (see figure below).
I hope that in OSX 10.9 email header symbols will indicate whether emails are S/MIME encrypted, S/MIME signed or S/MIME encrypted and signed.