A null MX is published together with other MX records.

MX_NULL_WITH_OTHERS · Severity: Error

• ErrorMX_NULL_WITH_OTHERS

  A null MX is published together with other MX records.

  RFC 7505 says a null MX must be the only MX record.

  Recommendation: Remove either the null MX or the other MX records.

Reported by

• Mail configuration check
• MX lookup

Available through the API

• Mail configuration check API
• Bulk mail configuration check API
• MX lookup API

Related findings

• Info MX_NULL The domain publishes a null MX and does not accept mail.
• Warning MX_NOT_FOUND The domain has no MX records.
• Error MX_TARGET_IS_IP An MX record points to an IP address instead of a host name.
• Error MX_TARGET_UNRESOLVABLE An MX host has no A or AAAA records.

All findings