Similar to SMS, you can send MMS message requests to Plivo at a rapid rate, as long as the requests do not surpass Plivo’s default API concurrency limit of 100 simultaneous requests. There are, however, limits to how quickly Plivo can send messages into the carrier networks. This guide is intended to explain the outbound MMS messaging rate limits.
MMS Rate Limiting for Long Codes
Plivo has two types of rate limits for sending MMS messages: long code phone number level and Account SID level.