Reg mail 123 english

Here is a sample email in English:

Subject: Regrettable Delay in Response

Dear [Recipient's Name],

I am writing to express my sincerest apologies for the regrettable delay in my response to your email dated [Date]. Due to unforeseen circumstances, I have been experiencing a high volume of work and have fallen behind on my usual response time.

Please be assured that I have not forgotten about your inquiry and am committed to providing you with a prompt and satisfactory response. I am working diligently to address your concerns and will get back to you as soon as possible.

Thank you for your patience and understanding in this matter. If you have any further questions or concerns, please do not hesitate to reach out to me.

Best regards,

[Your Name]

Please note that this is just a sample email, and you should adjust the content and tone according to your specific needs and circumstances.