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Would like to know is there any way to filter spoofing emails? The spoofing email issue is getting more and more serious and all of them are landing in users Inbox. This is getting very annoying and we will have to manually create a rule to filter them out when there is any new spoofing email comes out.
To solve this, I had tried to create below domain level content filtering rule but it is filtering all emails sent from our domain to our domain into Junk E-mail folder even the header contain (Authenticated). This had been tried on SM v7, v8, v10, v13. Anyone can advise?
From domain match ourdomain.com
To domain match ourdomain.com
Header does not contain: (Authenticated)
Action: Move to Junk-Email