Sending mail from Outlook causes an immediate bounce. Message says:
Your message did not reach any of the intended recipients.
Subject: FW: Meeting in Outlook
Sent: 27/02/2018 14:41:00
Message delivery failed. Please check PGP log for details.
The original message is embedded in this non-delivery report. Click Send Again to see the original text and have the opportunity to re-send the message. If the problem persists and you still receive another non-delivery report, please contact your administrator for details.
PGP Log says:
14:41:30 Email Info Processing outgoing message from <(null)> with subject: FW: Meeting in Outlook
14:41:30 Email Error MAPI Proxy: ..\shared\OCconnection.cpp : Line 301 : Echo::oc::OCconnection::SetUserInfo
14:41:30 Email Error SenderName is empty
14:41:30 Email Error Received OCC error ecBadParameter PGPError: (bad parameters)
In Outlook Account Settings the sender's name and email address is definitely not empty.
This behaviour continues even when PGP services are stopped, and SED is set not to process messages.