From 8f07186bb340ba23e120806953ee9005fa5fe032 Mon Sep 17 00:00:00 2001
From: Casey Ransom <1957293+cransom@users.noreply.github.com>
Date: Thu, 3 Aug 2023 12:25:56 -0400
Subject: [PATCH] nixos/parsedmarc: fix validation for smtp

Update the ini generator so that a list of emails is accepted.
---
 nixos/modules/services/monitoring/parsedmarc.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixos/modules/services/monitoring/parsedmarc.nix b/nixos/modules/services/monitoring/parsedmarc.nix
index 44fc359b6a7d..a146e7ab9543 100644
--- a/nixos/modules/services/monitoring/parsedmarc.nix
+++ b/nixos/modules/services/monitoring/parsedmarc.nix
@@ -301,6 +301,7 @@ in
               description = lib.mdDoc ''
                 The addresses to send outgoing mail to.
               '';
+              apply = x: if x == [] then null else lib.concatStringsSep "," x;
             };
           };