Wasay Syed

SPF Authentication: SPF-all vs ~all (What is the difference between Spf record -all vs ~all?) SPF stands for Sender Policy Framework. SPF  ~all means  “Not Passed” while   -all  means “SPF Failed and the email should be rejected.”   SPF lets the domain administrators to specify what mapped sub-domain or IP addresses are allowed to send emails on a domain's behalf. The setting is usually entered as a TXT record under domain DNS settings. If you want to read up more, then check out the details here . You can read about DMARC settings for  Google Apps . If settings are for Microsoft 365 /  Office 365: Under your domain DNS settings, a dd a entry into your domain registrar  Type = TXT Name = _dmarc Data =  v=DMARC1;p=quarantine;rua=mailto:admin@domain.com; pct=10; adkim=r; aspf=r; Type = TXT Name = @ Data = v=spf1 include:spf.protection.outlook.com -all