In your shoes, I'd be sending a form letter back to everyone trying to interfere, explaining that it's none of their business and if they don't quit trying to interfere, they won't be included either.

I can very nearly relate. You have my sympathy

It seems to me that the apple doesn't fall far from the tree in your family, or at least it applies to most (if not all) until you entered the picture. I sure hope that these relatives of yours is not invited.

I know was an email not sufficient?

My mother wasn't too supportive when my sister first told her she was engaged. For some time, she was very negative about it, and she openly told my sister how she felt (which, to be honest, I shared her opinions, but that's another story). She came around eventually and is now excited about it and is involved in the planning with her. This may not be the same in this case, but maybe stay on good terms with the parents and invite them to be involved? I'm not saying what they said is right, but they may still come around.

Costs 35 cents to send a letter, but it's free to mind your damn, motherfucking business bitch...

There's just one part of this story I don't understand: who still sends letters in 2016?

One less dinner plate to pay for! Family is who you want it to be. I gave up trying with most of mine and my life is better for it!

Both my brother and my fiancés mom actively tried to break us up; I feel your pain. Personally I want to elope and say screw it to everyone.

Let them bitch away, this is your day! Do it exactly the way you want it, and enjoy it!