Hello,
In order to fight the spoofing, we have just added 5 settings, we must observe the situation over several days.
Tell us about any new problems...
Warning :
any unauthenticated mail sent will no longer be phpmail or sendmail, refer to the necessary config to adapt on your side :
https://support.yoorshop.hosting/knowledgebase/2967/Deactivation-phpmail.html