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:M22.214.171.124 ~all
- IP is my public IP address
- MX is my cload spam filter provider.