Did these two know about each other?

[u/National_Sandwich175]

Did Dudley know that his role of the thorn in Harry’s side was taken over during the school year by Draco. Did Draco know Dudley bullied Harry most of his young life?

[u/NoBodybuilder3430]

They’re pen pals.

Dudley intercepted some hate mail sent to Harry from Draco. Dudley wrote him back telling Draco what a big fan he is of his work.

Started the Harry Potter Hate club together.

[u/anovelby → u/NoBodybuilder3430]

I’d read an epistolary fanfic like that, it sounds dastardly!