Email & PTR Issues
Reindl Harald
h.reindl at thelounge.net
Tue Nov 7 18:03:07 UTC 2017
Am 07.11.2017 um 16:31 schrieb James Pifer:
> I have issues emailing to certain domains. I use my own mail server to
> deliver mail. It is currently not sending through SMTP Relay. The
> failure says that I have a missing PTR record. For example:
>
> host al-ip4-mx-vip2.prodigy.net[144.160.235.144]
> said: 550 5.7.1 Connections not accepted from servers without a valid
> sender domain.alph151 Fix reverse DNS for 108.212.144.25
>
> I also tried moving my DNS to the provider I purchased my domain name
> from thinking that would be an easy fix. They don't support PTR records
> and actually had no clue what they even were
you need to understand some basics: the PTR has nothing to do with your
domain since it is the reverse DNS to the IP and oyu don#t own the IP
itself - AT&T is your friend and a matching PTR should be on top
priority of the checklist *before* even consider running a MTA on a machine
NetRange: 108.192.0.0 - 108.255.255.255
CIDR: 108.192.0.0/10
NetName: SBCIS-SBIS
NetHandle: NET-108-192-0-0-1
Parent: NET108 (NET-108-0-0-0-0)
NetType: Direct Allocation
OriginAS: AS7132
Organization: AT&T Internet Services (SIS-80)
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