Apology mail to customer for delay

Here's an example of an apology email to a customer for a delay:

Subject: Apology for Delay in [Service/Product] Delivery

Dear [Customer Name],

I am writing to express my sincerest apologies for the delay in delivering your [service/product] on [original delivery date]. We understand that you were expecting to receive it by then, and we fell short of meeting that expectation.

Please know that we take full responsibility for the delay and are truly sorry for the inconvenience it has caused you. We know how frustrating it can be to wait for something that is important to you, and we want to assure you that we are doing everything in our power to get your [service/product] to you as soon as possible.

Our team is working diligently to resolve the issue and get your [service/product] to you by [new estimated delivery date]. We will keep you updated on the status of your order and will notify you as soon as it is shipped.

In the meantime, we would like to offer you [optional: a discount on your next purchase, a complimentary [service], or a gesture of goodwill]. We value your business and appreciate your patience and understanding during this time.

If you have any questions or concerns, please don't hesitate to reach out to us. We are committed to making things right and providing you with the level of service you expect from us.

Once again, we apologize for the delay and appreciate your understanding.

Sincerely,

[Your Name] [Your Company Name] [Contact Information]

This is just an example, and you can customize it to fit your company's tone and style. Remember to:

Remember to proofread your email carefully to ensure it is professional and free of errors.