/for-email-admins/spamstop-app/server-side-sender-filter/ to receive email messages only from the senders that you have previously authorized Hugo en /for-email-admins/spamstop-app/server-side-sender-filter/microsoft-365-exchange/ Mon, 01 Jan 0001 00:00:00 +0000 /for-email-admins/spamstop-app/server-side-sender-filter/microsoft-365-exchange/ in Exchange Online you need to activate a new rule to set the confidence level of these messages to 6 (junk mail)