Please correct the email

[nsampath]

Sir,

Thanks for providing me an opportunity in your concern. I had sent you signed acceptance offer letter copy yesterday, Did you received?

With regards
xxxxx

[sarat_106]

Sir,

Many thanks for providing me an opportunity to serve (in) your concern. I had sent you the copy of signed acceptance offer letter yesterday. Hope (Did) you have received it. (?)

With regards
xxxxx

Delete words/letter in brackets. Asking question to some one superior is considered imploite.

[nsampath]

Thanks a lot!