The best solution is we improve iRedAPD to support some kind of whitelisting or bypassing. Feel free to create an issue as feature request here: https://github.com/iredmail/iRedAPD/issues
As a temporary solution, you can whitelist its server.
Or, update the score in SQL table "iredapd.senderscore_cache". Run a cron job to update the "time" column so that it won't expire.