DMARC report gen needs IMAP hostname matching certificate.

states/dmarc_reports/dmarcts-report-parser.conf

@@ -16,7 +16,7 @@ $dbpass = '{{ pillar['dmarcts']['mariadb_pw'] }}';
 $dbhost = 'localhost'; # Set the hostname if we can't connect to the local socket.
 $dbport = '3306';
 
-$imapserver       = 'localhost';
+$imapserver       = 'mail.lunch.org.uk';
 $imapuser         = 'dmarc';
 $imappass         = '{{ pillar['dmarcts']['user_pw'] }}';
 $imapport         = '993';