Is there a reason that pEp doesn't sign outgoing Emails?
I received Emails from different pEp-Users.
It seems to me that Emails sent from Thunderbird were not signed, while Emails sent from the Android App were.
At least one Sender sent signed and not-signed emails and the user-agents in the email header confirm that assumption.
All keys attached were named
pEpkey.asc so I assume the were sent through the corresponding client apps (Android or Enigmail).