Your sending limit is shown on your app, however local regulations will determine  how much you can send to a mobile wallet. Please check with your recipient on their balance before sending a huge amount. Limits are

Vodacom Mpesa Tier 1- 2,000,000  Tier2- 10,000,000Tzs Tier3- 50,000,000 daily max balance  

Transaction limit 3,000,000 per transaction.

Daily limit 5,000,000