Add `mailerEnabled` to the NodeInfo metadata

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Configuration: Filter.AnonymizeFilename added ability to retain file extension with custom text
 - Federation: Return 403 errors when trying to request pages from a user's follower/following collections if they have `hide_followers`/`hide_follows` set
 - NodeInfo: Return `skipThreadContainment` in `metadata` for the `skip_thread_containment` option
+- NodeInfo: Return `mailerEnabled` in `metadata`
 - Mastodon API: Unsubscribe followers when they unfollow a user
 - AdminAPI: Add "godmode" while fetching user statuses (i.e. admin can see private statuses)
 

lib/pleroma/web/nodeinfo/nodeinfo_controller.ex

@@ -165,6 +165,7 @@ def raw_nodeinfo do
         },
         accountActivationRequired: Config.get([:instance, :account_activation_required], false),
         invitesEnabled: Config.get([:instance, :invites_enabled], false),
+        mailerEnabled: Config.get([Pleroma.Emails.Mailer, :enabled], false),
         features: features,
         restrictedNicknames: Config.get([Pleroma.User, :restricted_nicknames]),
         skipThreadContainment: Config.get([:instance, :skip_thread_containment], false)