First, the executive order is not currently in force because a court has temporarily enjoined the administration from enforcing it. The temporary restraining order could be lifted in the future, so the executive order might come into force again.
Under the executive order, there is no change to visa procedures for those who aren't affected by it (that is, for those who are not refugees and are not "from" one of the affected countries; the lack of precision in this statement is because the interpretation of the order has been changing).
However, this could change. The order mandates a review of visa procedures, and it is possible that renewal by mail could be eliminated or curtailed in the future as a result of the review.
Your best bet, therefore, is to get in touch with the consulate and ask them. If you do, please come back and post an answer to the question.