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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