  We consider the problem of domain approximation in finite element methods for
Maxwell equations on curved domains, i.e., when affine or polynomial meshes
fail to exactly cover the domain of interest. In such cases, one is forced to
approximate the domain by a sequence of polyhedral domains arising from inexact
meshes. We deduce conditions on the quality of these approximations that ensure
rates of error convergence between discrete solutions -- in the approximate
domains -- to the continuous one in the original domain.
