some mail providers keep sending mail back due to no reverse dns set. I have set a reverse DNS on my rootserver through my datacenter’s online form, but the error keeps coming. I assume, i have to set also a reversedns within webmin/virtualmin. Can i do it once for all domains within a virtualmin installation? Since i have a server running virutalmin and a server running webmin, are there different steps of what to do, so i can reach those hosts, which won’t accept the emails of the various accounts?
The emails are being returned with the message, Reverse DNS hasn’t been set. It is set through hoster’s webinterface, Don’t i need to add something to the Bind prefs for that? They say it works from their side, but i will keep getting emails back.
If you like, you can always let us know what the domain name and IP address is, and we can test the reverse DNS for the IP address.
Alternatively, you can run the command “host x.x.x.x” on your Linux server (where x.x.x.x is your IP address), and that will return what the reverse DNS is for that IP address.
I found out, that this is an ISP based problem. The user’s IP adress didn’t have a reverse DNS entry, so Postfix would reject the connection request based on the rules. For doublechecking i have removed the reverse dns check, to find out, whether this was the problem.
In my case, I always called my ISP and request them to set a reverse DNS for the machine/IP/Domain in question. They always obliged and set it up without any charges!
NOTE : emailxxx.com has autoresponder software on it and is the website that will sendout mail (ie autoresponders) … the other 4 websites will also be using this autoresponder to do their email work.
(did a couple of tests including to my google email acnt & google classes anything sent from “emailxxx.com” as spam) … Ive not tested any others as yet but Im assuming the others, yahoo, AOL, etc will also state any mail received from “emailxxx.com” IS spam.
I checked on mxtoolbox.com for my IP - 174.140.xxx.xx and every “mx lookup” test on each of the 5 websites reported:
– SMTP Reverse DNS Mismatch – Reverse DNS does not contain the hostname
– SMTP Banner Check – Reverse DNS does not match SMTP Banner
mail.emailxxx.com ? (since this has the autoresponder software & all the other websites will use emailxxx.com autoresponder to send replies to whoever requested info)
do I get them to setup “reverse DNS” for ALL my 5 websites and/or their respective mail.xxx.com’s.
or
Do i go into “BIND DNS Server” and change each master zones records as not one of the 5 website master zones has a “Reverse Address”.
i DON’T KNOW HOW TO ADDRESS
SMTP Banner Check – Reverse DNS does not match SMTP Banner
SMTP TLS Warning – Does not support TLS.
I also did a DNS lookup and all 5 websites state:
– Local NS list does not match Parent NS list
174.140.xxx.xx was reported locally, but not by the parent
go into System Settings -> Server Templates -> BIND DNS Domain, and set “Master DNS server hostname” to be the name for your primary nameserver
= yes = server.gelxxx.com
existing domains, you’ll need to go into Services -> DNS Domain -> Name Server, and set your nameserver records in there.
In virtualmin/services/ theres nothing to do with DNS domain/nameserver … but in … server configuration/DNS Records it already shows the nameserver records there for each of the 5 websites already setup.
I think I have fixed items 7 & 8 … to modify SOA records:
Webmin -> Servers -> BIND DNS Server -> Module Config, choose Zone File Options from the dropdown
set “Serial number style” to “Date based (YYYYMMDDnn)”
so Im assuming these 2 items have now been addressed.
I know Ive rambled on a bit but Ive tried to give as clear a picture of my concerns as I can.
Thanks heaps in advance for your helping a newbie!