As approved by mr.nk to gkb through mail

It seems like you're referring to a formal approval process. Here's a possible response:

Subject: Approval for GKB through Mail

Dear [Recipient's Name],

I am pleased to inform you that Mr. NK has approved the request for GKB to be processed through mail. This approval is effective from [Date] and is valid until [Date].

Please note that the following conditions apply:

• The GKB will be processed through mail as per the agreed-upon procedure.
• The recipient is responsible for ensuring that the GKB is received and processed in a timely manner.
• Any issues or concerns related to the GKB should be reported to Mr. NK or [Your Name] immediately.

Please confirm receipt of this approval and acknowledge the terms and conditions outlined above.

Thank you for your cooperation and understanding.

Best regards,

[Your Name] [Your Title] [Your Organization]