Transform Meta Info

Display NameTo Domain [Sharing this MX]
Transform NameIPAddressToDomain_SharedMX
Short DescriptionThis transform returned shared domains on a MX record using historical/passive DNS
AuthorRoelof Temmingh (


This transform uses a special type of DNS Name - an MX record. It determines which other domains uses this DNS Name as an MX record. This is very useful in the infrastructure footprint of an organisation as it can reveal other domains that the organisation uses. If company X's Domain all have MX records pointing to a single DNS name this transform can find all (or most) of these domains.

Typical uses

Domain via transform MX Record to

MX Record via transform DNS Name to