1. Trên máy chủ enable DKIM và nhập key1
Trích dẫn:
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-----BEGIN RSA PRIVATE KEY-----
MIIEnwIBAAKCAQCIQIIeb2hC/UI1QVB+nHcdgm9MaaKDDZCoTcrT6cyl5jGqykpPPSXBCU+y
8NBlsispI7UdDXa359eHQDKyVShIXXJW1LK+r3IWaOHXa0XJUA Wg2M5ZieD/HGunDgf4IiRf
7Nb4M4nhAH5dyQCJHkiuonI6TNQIwMk3rXwKtxqW9C7w5ZYB1d QRK636WQpJ8T7jQIQ+uy3C
vNA7dxEM4bG7YPj6lyxFuDPBVurD2kgBhqXYaIdKumIbI6qaIl Y7zHDUaT34vo/ShJHJGSs3
yrWsmmKUHMQb40cq4W60rk/VGbMjtJG41ee7wpLIj3r4dU7zhzjP6Y3xEQKRpneKCO1dAgMB
AAECggEAFrE/upftcnLBqyL0qBGhGQ4XQU+6nD8PH6jNJhwjVGIRVZOZarcRaa QGXRQUcUuK
OrDSwkLyydBYKhN8Hg1mxx6hI2sLVgzcYHUZYApithOYzGAvhe Qb0AFIwKrqkt4E1uEYMIBM
72dopHAMocmka0ls4t7W1ZpeKOLA7Pvv9sH3BppdemlY8ur8ul ZFqh114ffQG+trg63ztcYE
RGXGV86Y92IDNHQQbRksNAwl1wJC4quuW9GF7sTjz7Gx2dI5h1 p2iPPwDn+o4Z7pmL5zyXnO
K2rIepKIzxNtqPhIHaNoww4zdXdmW7vinKo3NkmlsJR47dGEyG Q/ftXMQnnMoQKBgOLp0rvF
3FhXwK6Pw2Z95P6uwf11T7OfKdRVaa93fLJ0m2qXpek/uh0MTN7oEqBg2YO0ZDfT4b/KFMqU
oy8YAZItsGo9/Is39MML7gCTbhUfN5Ma290XNcF/63EvdrgxY5YSiq3a7LV1a1RhYn21SoFI
x/kn+Ky1O4wKOkliMBlFAoGAmbegOya6tkhZEFGtKgPXhr6ZKxyN PZoZe7qrObO+MtyM0419
CJyzjgmBoYlavLuHWfx1za6HWTQqv4woUEQWOBdTHB9FPiBHiX kKKWgzhfsK9dDO6ylKBYBE
5Uh5BuIuMD3SIwNAwQ8x35zXqqtOXDD+ZfMTseHdHJTC0Sd+aT kCgYCGRjEydjIegMb/RQku
1B626rjWgB3Kv8uj32srrvw2KbRyDgzaiqBaYhX27cNf7g+o1Q 1cz9/Newp0miI6Uu1TEABN
ziJsS49l/+A1rQg+LXvYa9Ng8EQaHdU35AtPkcJJYu13VY4vDq2VgA8lLit Jd8UF1jZcFN6I
zuCQ3i5yNQKBgHPf+1Z7tIYSdakamNmyObcmWJoqFMKaNpmRtt 9xgnAe173ly5pBXg01V1Xp
D9Bz4O1RpZAd/4OcEpmAUydmnAU+d/UcEXtqo+KarrFWDnjyLGnvNPwKjPUmo0jf3/PzbnQJ
Ni4UlqyyApuZRO4v4osWl79MhM00ARU5gr5d8inpAoGAqvpvJq f4laiLxmQhh6BrAugVTDeh
gmxIfqG3ku7XEt7pdHB/4SSfOBMMt7rK3jXkTyFzurx9GiiIGQfYyhle3QmvCottSkh24C Fx
LdD0b7DsZlKQt8FVCsogVx+AVHN/2Pw6GhAkYxBj5ty5JEyWdNb6vX77VTUdCK3dn5XwcCU=
-----END RSA PRIVATE KEY-----
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2. Trên Tên miền trỏ như sau:
@ TXT "v=spf1 ip4:202.143.110.226/27 ip4:103.42.58.137/25
include:gw.cloudemail.vn -all"
_dmarc TXT "v=DMARC1; p=none"
key1._domainkey
TXT
Trích dẫn:
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k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQ EAiECCHm9oQv1CNUFQfpx3HYJvTGmigw2QqE3K0+nMpeYxqspK Tz0lwQlPsvDQZbIrKSO1HQ12t+fXh0AyslUoSF1yVtSyvq9yFm jh12tFyVAFoNjOWYng/xxrpw4H+CIkX+zW+DOJ4QB+XckAiR5IrqJyOkzUCMDJN618Crc alvQu8OWWAdXUESut+lkKSfE+40CEPrstwrzQO3cRDOGxu2D4+ pcsRbgzwVbqw9pIAYal2GiHSrpiGyOqmiJWO8xw1Gk9+L6P0oS RyRkrN8q1rJpilBzEG+NHKuFutK5P1RmzI7SRuNXnu8KSyI96+ HVO84c4z+mN8RECkaZ3igjtXQIDAQAB
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_domainkey
TXT
k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQ EAiECCHm9oQv1CNUFQfpx3HYJvTGmigw2QqE3K0+nMpeYxqspK Tz0lwQlPsvDQZbIrKSO1HQ12t+fXh0AyslUoSF1yVtSyvq9yFm jh12tFyVAFoNjOWYng/xxrpw4H+CIkX+zW+DOJ4QB+XckAiR5IrqJyOkzUCMDJN618Crc alvQu8OWWAdXUESut+lkKSfE+40CEPrstwrzQO3cRDOGxu2D4+ pcsRbgzwVbqw9pIAYal2GiHSrpiGyOqmiJWO8xw1Gk9+L6P0oS RyRkrN8q1rJpilBzEG+NHKuFutK5P1RmzI7SRuNXnu8KSyI96+ HVO84c4z+mN8RECkaZ3igjtXQIDAQAB
Chú ý: Có thể bỏ dấu 2 " tùy từng dns của các nhà mạng khác nha