Technical support is provided via email.
In Kaleidoscope 2 or NetNewsWire 4, click
Help > Send
Feedback to contact us. This will generate a new mail
message that includes details about your Mac and app configuration
which can help with troubleshooting. This is the preferred method
for contacting us for help with those apps.
Alternatively, you can always send an email to firstname.lastname@example.org.