Do you find the following email reply to be emotional, aggressive or inappropriate communication?
Hi-
Monday? Yes, we made an error but we need to get this right for the customer. Asking them to wait almost another week is unacceptable.
This is an 80 piece order – what is the reasoning behind not getting it there until Monday? If we cancel the order and re-key for the next day they could get it this week. Should we do that or?

We need to work together to find a better solution for this.

It's curt, but not emotional, aggressive, or inappropriate imo.

I think it’s to the point and factual. Only the sentence saying the delayed timeline is unacceptable could be taken harshly, but you soften it in the next few sentences so it’s fine.

I can see why the receiver sensed frustration in the lack of softening the message, especially if they are responsible for the problem, but this is clear and direct and I see no problem with the message itself.

You mention this recipient sends you things like this regularly. This suggests you have a sensitive employee that reads their own emotions & biases into every communication that doesn't have flowery language. Or....

Do they have history with this sender or dept or are they just over-sensitive? That's the question in my mind as an outsider.

This is okay. They are right about getting it right for the customer. They are asking for a reason, and providing a possible solution. They are also initiating a better working relationship.

Direct and to the point - email reads fine to me

It’s just very direct and if this is addressed to the person who made the error I could see how it may sound aggressive.

I don’t see anything wrong with this email.

It depends on who you are sending the email to.

Take out the sentence about asking them to wait another week is unacceptable. You get more bees with honey.

Or talk to the person. Sometimes typed words come out harsher than what you intended.

I don't think it was. It is direct, straight to the. Point and even offered recommendations for a solution.

No this email is fine. It states what needs to be done. Every email cannot be nice and sweet.