An Antimagic Field (PHB, p213) creates an area
[…] divorced from the magical energy that suffuses the multiverse. Within the sphere, spells can't be cast, summoned creatures disappear, and even magic items become mundane.
But,
Spells and other magical effects, except those created by an artifact or a deity, are supressed in the sphere and can't protrude into it. [Emphasis mine.]
To what extent is divine magic supposed to be 'created by a deity'? To the extent that it is unaffected by an Antimagic Field?
Best Answer
There is a distinction between a spell, and a spell effect. Deities directly grant their worshipers spells, but not spell effects—the worshipers themselves still need to cast the spell, that is, finish it, to create the spell effect. Though most of the heavy lifting has been performed by a deity, the actual effect in the end is created by the worshiper, a mortal.
Thus, the effects of divine spells are subject to an antimagic field and do not function therein.
If a god came down in person to cast a spell, then that would ignore an antimagic field. So, for example, a god could cast some spell upon a mortal as a form of reward (or punishment) and that would ignore antimagic field.