I put fensterhaus.de on the postfix Whitelist but some mails a rehected bei RSPAMD, see attached screenshot.
The Postfix whitelist is for Postfix SMTP server, not for Rspamd. Rspamd is the Spam filter of your server, it use the spamfilter whitelist.
is there a priority between postfix and spamfilter whitelist. I ask why i had blocked som mail and added the sender to postfix whitelist, then I got the mail.
Postfix whitelist and spamfilter whitelist are completely separate things. Postfix whitelist is used in conjunction with the postfix blacklist. Might be that your mail was just greylisted or something similar. rspamd does not know what you set in the Postfix whitelist, and having whitelisted an address in Postfix does not influence spam scoring in Rspamd.
No, just add it to spamfilter whitelist. Using Postfix whitelist would only be necessary if you used Postfix blacklist to blacklist the domain of that sender, and I guess you have not done that.
