7e4af091_igh_Speed_Internet__Postmaster__What_To_Do
[Error Code] 452 - [Message threshold exceeded] [Description] Cox enforces various rate-limits to protect our platform. The sending IP has exceeded one of these rate-limits and has been temporarily blocked [What To Do] 
Slow down the rate at which you attempt to send messages.
Cox High Speed Internet: Postmaster
What To Do