Can I text a number I blocked on iPhone?

So, I sent my ex a series of iMessages, but then realized that I'd blocked his number and forgot to unblock him before they were sent. Will he still receive my messages or do I have to send them again now that he's unblocked?

They will go.

Blocking does not affect outgoing calls or texts.

He can see you're messages weather you blocked him or not unless he blocks you too