MX record with only one dot, possible?
Lets say I have the following DNS active for domain example.com (leaving out ttl)
example.com MX 0 .
Does it mean that the MX record does point to example.com? That server with name example.com will handle mail for example.com domain?
Solution 1:
An MX record consisting of only a single dot . is a Null MX as defined in RFC 7505. It means that the domain doesn't accept any email.