AWGear 
"[@Dustcan":](/pony/season-9-discussion-thread-no-spoilers/post/4491620#post_4491620
)
Yea, he's pretty useless when stuck in a cage in Tartarus.
"
[@GenericArchangel":](/pony/season-9-discussion-thread-no-spoilers/post/4491622#post_4491622
)
No he doesn't? He's a criminal at least, and (litterally) a monster. Why should he have rights? Besides, if anyone would be able to send him letters, it would be limited to Celestia and (if he's still alive) Scorpan.
Tartarus is a "high security" prison for Equestria's most dangerous criminals, not a bloody hotel. Even if he had rights to mail, it would probably be checked for it's contents.
The Devil's Advocate
Yea, he's pretty useless when stuck in a cage in Tartarus.
"
[@GenericArchangel
No he doesn't? He's a criminal at least, and (litterally) a monster. Why should he have rights? Besides, if anyone would be able to send him letters, it would be limited to Celestia and (if he's still alive) Scorpan.
Tartarus is a "high security" prison for Equestria's most dangerous criminals, not a bloody hotel. Even if he had rights to mail, it would probably be checked for it's contents.