Validate your email again. According to your profile page, "The "Send Email" feature is disabled because this user is currently inactive."
Failing that, contact Geocaching HQ.
Hi. How do you validate your email again when it's already been validated?
If I go to Account Settings -> Email Preferences I can see a green tick next to my email with the word validated next to it.
I've also added a second email address and validated that as well, so now I have two validated email addressees.
Everything on the website is suggesting everything is validated ok but obviously the geocaching apps think differently.