How is our SPF assessment performed

Ceeyu assesses the presence of SPF by querying the DNS system for your domain and by verifying if the SPF record is present.

We also check that the registration is configured in accordance with the SPF RFC. This is the case if none of the following problems are present:

  • There can be only one SFP record per domain.
  • The number of lookups being done to fetch all allowed IP addresses must be below or equal to 10.
  • The amount of netblocks (blocks of IP addresses) you authorize in your SPF record must be below 75. The more netblocks, the more servers that can send mail on your behalf. The lower the number of netblocks, the lower the risk an unattended IP addresses changes ownership to a party with malicious intentions.
  • Duplicate IP addresses or netblocks cannot be present as these render your SPF record non-RFC compliant.

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