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Solusi Email : 501 5.7.0 Domain must resolve

Problem :

xxx@karyo.com
host mail.karyo.com [202.x.xx.xx]
SMTP error from remote mail server after MAIL FROM:<xxx@games.com> SIZE=531718:
501 5.7.0 Domain must resolve
xxxx@adhikarya.com
host mail.karyo.com [202.x.xx.xx]

Solusi :

reverse-dns (PTR Record) IP nya musti valid ( sama dengan domain nya ) .

Untuk solusi bisa lihat di artikel Cara cek validasi DKIM,SPF dan RDNS domain.

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