3 Dec
2015
3 Dec
'15
7:37 p.m.
On 03/12/2015 19:16, Timothy Pearson wrote:
As you can probably infer the main problem is that my
ISP doesn't provide
enough IP addresses (at a cost I am willing to pay) for all the services
running here. From what I understand multiple rDNS records for the same
IP is likely to cause more problems than it's worth as well.
After the servers are relocated next year there should be more IP
addresses available, which will make this problem go away. I'm not all
that keen on changing the HELO string as it isn't technically the domain
that's identifying, it's that specific mail server, and over time there
may be more than one mail server (for redundancy, etc.).
Since this has affected only one person in 5 years, I'm treating this like
the DKIM problem for the moment; give it more time and it might go away.
:-)
Tim
It's certainly up to you how you run things, but it won't go away. :)
rDNS is really only important for mail servers but it is becoming
increasingly important as the amount of spammers reaches astronomical
proportions. An increasing number of servers will reject mail due to
failed rDNS.
You could just get your ISP to point your IP's rDNS to your mail server
hostname and your done. You won't need it for any of your other services
and it will not affect any of your A records or CNAME records.
Regards,
Mike.
--
Mike Howard