FEATURE: hide posts from incoming email based on dmarc verdict (#8333)

config/locales/server.en.yml

@@ -1900,6 +1900,7 @@ en:
     log_mail_processing_failures: "Log all email processing failures to <a href='%{base_path}/logs' target='_blank'>/logs</a>"
     email_in: 'Allow users to post new topics via email (requires manual or pop3 polling). Configure the addresses in the "Settings" tab of each category.'
     email_in_min_trust: "The minimum trust level a user needs to have to be allowed to post new topics via email."
+    email_in_authserv_id: "The identifier of the service doing authentication checks on incoming emails. See <a href='https://meta.discourse.org/t/134358'>https://meta.discourse.org/t/134358</a> for instructions on how to configure this."
     email_in_spam_header: "The email header to detect spam."
     email_prefix: "The [label] used in the subject of emails. It will default to 'title' if not set."
     email_site_title: "The title of the site used as the sender of emails from the site. Default to 'title' if not set. If your 'title' contains characters that are not allowed in email sender strings, use this setting."

config/site_settings.yml

@@ -965,6 +965,8 @@ email:
   email_in_min_trust:
     default: 2
     enum: "TrustLevelSetting"
+  email_in_authserv_id:
+    default: ""
   email_in_spam_header:
     type: enum
     default: "none"