보내다(bo-nae-da, bonaeda)
To send or dispatch something to someone or somewhere
When to use
Sending letters, Email transmission, Sending gifts, Moving people (sending someone)
The nuance
Use 보내다 when the subject initiates sending an object or message to another party or place.
받다(bat-da, batda)
To receive or get something that arrives from someone or somewhere
When to use
Receiving gifts, Receiving emails, Receiving letters, Obtaining information
The nuance
Use 받다 when the subject receives or obtains an object or message coming from another party or place.