Hello @prof.garrison.smc
Thank you for letting us know the spam filters seem a bit aggressive! URLs to GTN tutorials and to a shared history at a UseGalaxy server should be possible, but I’ll double check that it is working correctly. Meanwhile, I adjusted your account to allow links. 
These are the two primary ways to share:
FAQ: Sharing your History- Then for workflows, an invocation is best! please see
How to capture a share link to a Workflow Invocation