Subj : New One
To   : Michiel van der Vlist
From : Richard Menedetter
Date : Thu Nov 19 2020 21:17:24

Hi Michiel!

18 Nov 2020 14:40, from Michiel van der Vlist -> Richard Menedetter:

 RM>> If you get back a different domainname you usually get a malus.
 MV> "different" from what?

From the expected domain.

Eg. you have an MX record for vlist.com that is mail.vlist.com.
You resolve mail.vlist.com to IPv4 or IPv6 x.x.x.x.
Then you do a reverse lookup of x.x.x.x.
If the outcome is not the domain you started from then its bad.

CU, Ricsi

.... An unchallengeable precept must be viewed with the deepest suspicion.
--- GoldED+/LNX
 * Origin: Difficult? I wish it had been impossible! (2:310/31)

.