How do I send a secure message with SmartLockr? June 02, 2022 09:53 Updated Follow In this video we will show you how to use the secure message option of Smartlockr: Related articles How do I send a secure file with SmartLockr? How can I block an email that was already sent? How do I send a public file with SmartLockr? Comments 0 comments Article is closed for comments.