Attacker usurped email address

Hello, good evening.
An unknown person took over an email address of my domain and is sending me spam message, he uses different IP addresses to send mails and Microsoft mail software.
I can’t find a way to block his access and recover the address, I need help, I can’t even send an abuse ticket to Cloudflare support.
I read your answers.

Hi there,

If the attacker is spoofing the origin, you would benefit from enabling DMARC: Enable DMARC Management (beta) · Cloudflare DMARC Management docs

More about DMARC here.

Take care.

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