N/A is an unreasonable "reason" for moderation
Received the response below - "N/A" is not helpful; I'm guessing there's a reason that isn't in some translation table.
In any case, as a user it seems arbitrary (and not actionable):
Subject: Your message to mailman-users@mailman3.org awaits moderator approval
Date: Thu, 29 Jun 2017 10:52:37 +0000
From: mailman-users-bounces@mailman3.org
To:
Your mail to 'mailman-users@mailman3.org' with the subject
Re: [MM3-users] Re: REST API notes
Is being held until the list moderator can review it for approval.
The message is being held because:
N/A
Either the message will get posted to the list, or you will receive
notification of the moderator's decision.