Even HaEzer Q&A Group

It is forbidden to send a gift to an idol worshiper on his holiday. Unless he knows that this individual does not acknowledge idols and does not worship idols. It is permitted to send an idolater a gift a day before his holiday. An idolater who sent a gift on the day of his holiday one should try not to receive it from him. If however it was received on the day of his holiday it should be eradicated.