You cannot use services like Western Union, Ikobo, Xoom & MoneyGram to send money from India to abroad ( outward remittance ). Reserve bank of India don’t allow you to send money (Outward Remittance) from India using these services. You can receive money using these services(Western Union, Ikobo etc), Reserve Bank of India has no issues with it.
The Money can be sent to abroad countries using the following modes:
If you receiver has Paypal account, you can directly send payments through Paypal.