How to figure out genuineness of job offer and agreement?

I have received a offer and agreement letter from company named Maple plant food Canada through a agency named milestone located in Chandigarh.
I have doubt about its genuineness - how do I ascertain?

Dear Puranb,
1.IRCC and ESDC are the responsible bodies which determine that whether a job offered by an employer from Canada to a foreign individual is genuine or not. ESDC confirms this by the following steps:
2.You can also contact High Commission of Canada in New Delhi.
3. Where to check whether the Recruiting Agent is registered with the Government or not?
- Always deal with a registered Recruiting Agent. Only then will your rights be protected. Whether a Recruiting Agent is registered or not can be checked on the
E-migrate portal:https://emigrate.gov.inExternal
- you can download the list of active recruiting agents on the https://emigrate.gov.in/ext/openPDF?...IST_REPORT.pdf
Regards,
Amit