RDNS for shared hosting?

[OneApplications]

Hi,

I have a VPS Hosting with the following IP config...

IP1 = Primary server IP + ns1 (my "main domain" is hosted on this ip)
IP2 = ns2
IP3 = shared hosting

I have RDNS setup on the primary IP for my main domain. I was wondering how I go about setting up RDNS for the shared hosting accounts? Also when one of the shared accounts sends an email they will be in effect using the mail server of the main domain and therefore won't the RDNS check be against the primary IP rather than ip3? If this is the case do I actually need to have RDNS for the third IP?

Thanks in advance,

Chris.

[eUK-Nick]

Originally Posted by OneApplications

Hi,

I have a VPS Hosting with the following IP config...

IP1 = Primary server IP + ns1 (my "main domain" is hosted on this ip)
IP2 = ns2
IP3 = shared hosting

I have RDNS setup on the primary IP for my main domain. I was wondering how I go about setting up RDNS for the shared hosting accounts? Also when one of the shared accounts sends an email they will be in effect using the mail server of the main domain and therefore won't the RDNS check be against the primary IP rather than ip3? If this is the case do I actually need to have RDNS for the third IP?

Thanks in advance,

Chris.

Hello Chris,

Reverse DNS is required for the IP address which you mail servers uses to deliver the outgoing emails from your VPS Hosting to the intended destination. As a practise, all VPS Hosting' are configured to use the main IP address of the VPS Hosting itself; which is why only the main IP address has rDNS set. Since all the domains on the VPS Hosting are also setup on this main IP, they in turn automatically able to derive the benefit of the rDNS.

If you wish, we can setup up rDNS for each of the IP's of your VPS Hosting. You only have to raise a support ticket from here

[OneApplications]

Ok thanks Nick.

I thought that might be the case. I was using mxtoolbox to check the mail server for one of the shared domains (mail.jvleisure.co.uk) and it was reporting "No RDNS". This makes sense because I guess the mail server for this domain would appear to be on the third IP and an RDNS check against that IP would fail. In reality mail sent from ANY IP on my Dedicated Server goes out through the main IP. Is that correct?

That is a bit of a pain because the whole reason for getting the separate IP was to keep the mail delivery between the main domain and the shared hosting separate. Nevermind, I'll just have to keep a close eye on the shared accounts and make sure they're not getting me blacklisted!

I'm sure the answer to this question will be no but is it possible to have a second mail server running? One that sends mail from the third IP?

Cheers,

Chris.

[eUK-Nick]

Originally Posted by OneApplications

Ok thanks Nick.

I thought that might be the case. I was using mxtoolbox to check the mail server for one of the shared domains (mail.jvleisure.co.uk) and it was reporting "No RDNS". This makes sense because I guess the mail server for this domain would appear to be on the third IP and an RDNS check against that IP would fail. In reality mail sent from ANY IP on my Dedicated Server goes out through the main IP. Is that correct?

That is a bit of a pain because the whole reason for getting the separate IP was to keep the mail delivery between the main domain and the shared hosting separate. Nevermind, I'll just have to keep a close eye on the shared accounts and make sure they're not getting me blacklisted!

I'm sure the answer to this question will be no but is it possible to have a second mail server running? One that sends mail from the third IP?

Cheers,

Chris.

Chris,

You can have your mailserver use an IP which is different and also not the one which your website hosting uses. That way you can ensure that website hostings and mailserver both have different IP's.

You can use 2 mail serves with two different IP's on the same VPS Hosting if you wish so. However this will increase the average process load on your VPS Hosting as the CPU will have to attend to two different mailservers.

[OneApplications]

Ah ok that's interesting. Ideally I'd have my "main domain" using the current mail server on IP1 and then setup the second mail server on IP3 with the shared accounts. The shared accounts can then just use the new mail server. I'm probably only going to be hosting a handfull of sites so I'd like to think that server load won't be an issue.

I might not bother with this just yet Nick but what's the best way to get this setup? Is it a simple task or is it best left to the experts?

[eUK-Nick]

Originally Posted by OneApplications

Ah ok that's interesting. Ideally I'd have my "main domain" using the current mail server on IP1 and then setup the second mail server on IP3 with the shared accounts. The shared accounts can then just use the new mail server. I'm probably only going to be hosting a handfull of sites so I'd like to think that server load won't be an issue.

I might not bother with this just yet Nick but what's the best way to get this setup? Is it a simple task or is it best left to the experts?

Chris,

Going by your word of not having too many website hostings hosted, you can opt for having two different mail servers. I would suggest that you raise a ticket for the VPS Hosting staff to help you with this. You would have to explain clearly the different nameservers and their allocation.
The ticket board link is here

You may also email them directy.The email address is VPS Hosting[at]eukhost.com.

[OneApplications]

Ok thanks for the help Nick. It's good to know that it's possible anyway. I'll hold off on doing it just yet as I'm right in the middle of a set of night shifts (that makes two of use then!! )

I'll probably give the VPS Hosting guys a shout in a few days.

Thanks Nick!