For support requests related to the wallet or its affiliated custodians, you can send an email to firstname.lastname@example.org
Alternatively, if the question is of public significance, or does not involve sensitive information, you can post in our ANN thread / PM our account on bitcointalk
For extremely sensitive issues you can encrypt your message using the following PGP key:
Note: Never send your private keys, wallet seeds, and or any other private information to anyone. Be aware: certain support requests could potentially deanonymize you.