add spam folder warning

CHANGELOG.md

@@ -10,6 +10,8 @@ CHANGE: Tweaks to build and release process for logging and deprecations. Pin go
 
 CHANGE: Improvements to email invitation sent in response to `zrok invite` to correct broken links, some minor HTML issues and improve overall deliverability (https://github.com/openziti/zrok/issues/405)
 
+CHANGE: Added warning message after `zrok invite` submit directing the user to check their "spam" folder if they do not receive the invite message.
+
 # v0.4.7
 
 FEATURE: OAuth authentication with the ability to restrict authenticated users to specified domains for `zrok share public`. Supports both Google and GitHub authentication in this version. More authentication providers, and extensibility to come in future `zrok` releases. See the OAuth configuration guide at `docs/guides/self-hosting/oauth/configuring-oauth.md` for details (https://github.com/openziti/zrok/issues/45, https://github.com/openziti/zrok/issues/404)

cmd/zrok/invite.go

@@ -89,7 +89,8 @@ func (cmd *inviteCommand) run(_ *cobra.Command, _ []string) {
 			tui.Error("error creating invitation", err)
 		}
 
-		fmt.Printf("invitation sent to '%v'!\n", email)
+		fmt.Printf("invitation sent to '%v'!\n\n", email)
+		fmt.Printf(fmt.Sprintf("%v\n\n", tui.Attention.Render("*** be sure to check your SPAM folder if you do not receive the invitation email!")))
 	}
 }