fireguy1125
asked on
MX record failover and duplicate entries
We have 4 MX records for our domain. 2 are ours, and 2 are pointing to a backup MX service.
My question is regarding specifically our 2 MX records. This seems unnecessary, and I dont know what the purpose is of having both of these, since we only have 1 e-mail server.
Our entries are:
company.org. 600 IN MX 5 company.org.
company.org. 600 IN MX 20 mail.company.org.
company.org. 600 IN MX 30 globala.backupmx.com.
company.org. 600 IN MX 40 globalb.backupmx.com.
when I attempt to telnet to mail.company.org 25, i don't get a connection. When i telnet to company.org 25, I get successful connection.
Does that mean that the mail.company.org MX record is invalid and unnecessary?
Can I remove the mail.company.org MX record?
Also, regarding the failover aspect of the MX records. If the company.org and mail.company.org are not accessible, such as when telnet port 25, does that mean it will attempt to go to next priority, which would be our backup mx service?
Thank you!
My question is regarding specifically our 2 MX records. This seems unnecessary, and I dont know what the purpose is of having both of these, since we only have 1 e-mail server.
Our entries are:
company.org. 600 IN MX 5 company.org.
company.org. 600 IN MX 20 mail.company.org.
company.org. 600 IN MX 30 globala.backupmx.com.
company.org. 600 IN MX 40 globalb.backupmx.com.
when I attempt to telnet to mail.company.org 25, i don't get a connection. When i telnet to company.org 25, I get successful connection.
Does that mean that the mail.company.org MX record is invalid and unnecessary?
Can I remove the mail.company.org MX record?
Also, regarding the failover aspect of the MX records. If the company.org and mail.company.org are not accessible, such as when telnet port 25, does that mean it will attempt to go to next priority, which would be our backup mx service?
Thank you!
Yes mail.company.org is invalid.Keep this record you will need this in Exchange.you will need mail.company.org and company.org.
Keep primary and secondary as per your convenience.
Thanks
Srikanth
Keep primary and secondary as per your convenience.
Thanks
Srikanth
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ASKER
Attached is a screenshot from our dyndns where we have all of our records:
ASKER
An nslookup on the mail.company.org returns the IP address with what i believe are the DYNDNS server.
We have a URL redirection for the mail.company.org setup, because our exchange server DNS name is outlook.company.org so to make it easier for employees we have the full address path of our webmail (https://outlook.company.org/exchange) redirected from mail.company.org
My goal during out e-mail move is to setup our new e-mail server with the the mail.company.org name from the beginning, and remove the web hop.
So from my understanding, with the setup right now, the mail.company.org MX record is useless since I have a redirect for that address. However, when migrating to new server, and setting it up as mail.company.org, that MX record will be necessary.
So with the current setup if the active MX host, 5 company.org is unavailable, it will go to the 30 backupmxhost.com, since the 20 mail.company.org MX record is not setup correctly.
We have a URL redirection for the mail.company.org setup, because our exchange server DNS name is outlook.company.org so to make it easier for employees we have the full address path of our webmail (https://outlook.company.org/exchange) redirected from mail.company.org
My goal during out e-mail move is to setup our new e-mail server with the the mail.company.org name from the beginning, and remove the web hop.
So from my understanding, with the setup right now, the mail.company.org MX record is useless since I have a redirect for that address. However, when migrating to new server, and setting it up as mail.company.org, that MX record will be necessary.
So with the current setup if the active MX host, 5 company.org is unavailable, it will go to the 30 backupmxhost.com, since the 20 mail.company.org MX record is not setup correctly.
It looks to me like mail.????????.org is set to redirect to https://outlook.???????.org/exchange for OWA (11 lines down).
As it stands it looks like the mail.????????.org MX record isn't doing anything, as that address relates to a web redirect to a specific page, and so wouldn't work as an MX record in its current state.
I still don't think you would have any problems removing the MX record for this address.
M@
As it stands it looks like the mail.????????.org MX record isn't doing anything, as that address relates to a web redirect to a specific page, and so wouldn't work as an MX record in its current state.
I still don't think you would have any problems removing the MX record for this address.
M@
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I would say yes that seeing as you only have the one mail server you can remove the second entry. It is possible that in the past your company migrated servers and for a period had two servers before making the older one redundant.
If you check the IP address you get for mail.company.org and have a look at the mapped IP's in your firewall, it should show you the server it is/was pointing to, so that you can ensure it is no longer in use.
M@