Can send mail (But send to gmail, then go to spam mailbox)

Hi guys!
Please help me!

Current status

  • I can send mail but when sending to gmail, it is sent to spam mailbox
  • Can receive mail from gmail

MXToolbox Health Checker reports warning for a domain in Plesk: DMARC Quarantine/Reject policy not enabled

My domain thuonghieuaz.com Domain Health
My dns clouldflare https://i.imgur.com/m1bI9g8.png

Thanks!

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