* Confirmation of the existence of an @MX@ record for the domain part of
the address. This is not required; in fact many domains accept mail
via an @A@ record for e.g. example.com which is used in lieu of an @MX@
record. This behavior can be controlled via the @--accept-a@ flag.
* Confirmation of the existence of an @MX@ record for the domain part of
the address. This is not required; in fact many domains accept mail
via an @A@ record for e.g. example.com which is used in lieu of an @MX@
record. This behavior can be controlled via the @--accept-a@ flag.