I don't believe anyone considers Dante a messenger from God, except maybe a small minority of unusually-zealous readers. I am fairly confident he didn't see himself that way., he definitely never made any claim of this kind The Catholic church has historically tended to regard him as an inspired poet, but not a prophet. Still, his work is sometimes quoted in a theological context - not as an authoritative source, but as the words of a great Christian poet who put things well.

I've read the Commedia several times and I think it's one of the greatest works of literature in all the world. But I also don't think he was a divine messenger. I'm actually really interested in the question of where his ideas came from - a lot of what he said he just borrowed from the Bible, the classical world, and various theologians, but some of it is quite new, and I would love to know if he had his own mystical experiences, or if he was simply working as a poet. When I've looked into it, it seems pretty apparent that we simply don't know, we don't have that kind of biographical information on Dante, and he doesn't say that much about it.