Is use DMARC and SPF to protect my domain, however a client recently became infected with malware and propogated the malware via spoofed email. Now clients of mine are receiving mail addressed as me. The question is how, what have I missed here.
v=DMARC1; p=none; rua=mailto:helpdesk@mydomain
v=spf1 +a +mx +ip4:M184.108.40.206 ~all
- IP is my public IP address
- MX is my cload spam filter provider.
~all is a softfail,Allow mail whether or not it matches the parameters in the record
-all is a hard fail