word choice - "Our end" vs. "our side"

Which is correct when writing emails?

1. Everything is fine at our/your end.


2. Everything is fine at our/your side.

Answer

Between those two sets of choices specifically, the first is correct.

However, using 'our side'/'your side' isn't the part that's wrong in the second examples, it's the preposition: you can be at an end, but you are on a side. So you could say "Everything is fine on our side."