St. Paul warns us that if he came with another gospel he will falls under the same curse he said that to indicate that there is no exception to accept a false Gospel coming from any person, including any angel.

There Is No Other Gospel
6 I am astonished that you are so quickly deserting him who called you in the grace of Christ and turning to a different gospel—[a] 7 not that there is another gospel, but there are some who trouble you and want to pervert the gospel of Christ. 8 But even if we, or an angel from heaven, should preach to you a gospel contrary to that which we preached to you, let him be accursed. 9 As we have said before, so now I say again, If any one is preaching to you a gospel contrary to that which you received, let him be accursed.
10 Am I now seeking the favor of men, or of God? Or am I trying to please men? If I were still pleasing men, I should not be a servant[b] of Christ. Galatians 1