Agency hires me to convert a 4 column + sidebar + pattern backgrounds email to responsive, for a big client, I make a redesign, simplifying it (less columns, flat...) to avoid issues, client insists, exactly the same design is needed.

I tell him its almost impossible but I will try, and try, and try, many times, but on their old Outlook, some email parts are not aligned (just that), try, and try, many hours, many days beyond budget... all the times since first explaining that perfection is not possible with all possible email clients, and like 7% is using outlook... At that point, and before, email was so well.

Finally I put an end to this, tell them to pay and leave me alone, as they didn't take my advises and warnings serious, not my fault.

This story is nothing until the discovery I made today: the agency had signed a contract with the client, a bank, in that contract there was the obligation to replicate exactly the same design and should be perfect in all email clients...