What is the difference between blocking a user and marking a ticket as spam?


These are two separate actions with different effects:
 
Mark as Spam (per ticket):
 
  • Moves that specific ticket to the Spam folder
  • Sender can still submit future tickets
  • Other tickets from the same sender are unaffected
  • Reversible: Admin can restore from Spam folder
 
Block/Disable User (per user):
 
  • Completely blocks the user from submitting any new tickets
  • Blocks login access to the portal
  • All future emails from this user are rejected
  • Existing tickets remain in the system
  • Reversible: Admin can re-enable the user

Use "Mark as Spam" for individual unwanted tickets.
Use "Disable User" when you want to permanently block all communication from a sender.