もらう

I wonder, does もらう always become an auxiliary verb when attached to the て form. I was talking to a friend yesterday and somehow 喜んで受けてもらう slipped out. Can もらう simply mean "receive" here as in 勇気をもらう or does it always have an auxiliary meaning in these situations? "I'll have you gladly receive it"?

Should probably just have said 「喜んで受け取る」

もらう can mean "to receive" even after the -te form as same as other auxiliary verbs.
e.g.
商品を店に行って、もらう（＝店に行ってから、もらう）
テレビを見て、行く（＝テレビを見てから、行く）
However, unlike 喜んで、もらう, 喜んで受けてもらう can't have this meaning since 受ける has a similar meaning to もらう here.

I see. That makes sense. Seemed quite natural at the moment. Lack of speaking practice I guess. Thanks as usual.