MX/DNS records

Hi All,
I've taken over a new client’s IT – There DNS records are shown in the screen shot attached– the last IT guy seems to have duplicated MX records and has a unnecessary A record … information on this   All virtual directories in exchange 2013 have “remote”  and also OutlookAnyWhere has “remote” eg:

looking at my DNS Picture is it safe to say for MX records I can remove both the “remote” MX records that point to my web-filtering service as there is already MX records point to the web-filtering service already?

Also there is a “mail” A record but my exchange 2013 does not have this configured for virtual directories – could this be removed??  Im assuming I need to keep the “remote” A record as I am using this for my exchange directories..
jag bAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Without understanding I would not remove the remote based MX.

From the glance I think the setup is everyone in the firm has an email that is routed through a filtering resource that then delivers presumably to the internal exchange server.
Some mailboxes/aliases/distribution/lists then redirect the to

The likely reason that both are being sent through the external processor is just in case the remote based email leaks out by the remote users.

Before making any external records, my recommendation is to use the exchange traces and the configuration of exchange to determine what is going on.
Is there another exchange server that serves the if not present on the exchange?
jag bAuthor Commented:
hi Arnold,
I can confirm they have only 1 exchange server but not sure why he has added the remote as they do not have no email addresses that have
Those can be aliases for each domain.
It is a speculation on my part. You can remove the remote if you are certain. That might have been setup as a test to transition from one MX provider to another.

Do you have access to the 3rd party filter provider to see where the points to within their system/interface?
Defend Against the Q2 Top Security Threats

Were you aware that overall malware worldwide was down a surprising 42% from Q1'18? Every quarter, the WatchGuard Threat Lab releases an Internet Security Report that analyzes the top threat trends impacting companies worldwide. Learn more by viewing our on-demand webinar today!

jag bAuthor Commented:
im 100% certain - I spoke to the client they do not use no email address
im going to change the 3rd party filter provider and also only have it pointing to - so emails will hit this then to my internal server...

Can I remove the "mail" A record? as I am only using "remote" in my exchange directory? am I correct in saying that for example if no MX records where present and as I have my exchange setup as "remote" for directories then this picks up from the "remote" A record IP into my internal server
Yes, in the absence of an MX record, the A record if exists is used.
regarding the mail, double check what the 3rd party filter uses as the destination for the post-processed emails.
You may have to leave mail because the outgoing emails are being sent directly from your exchange server to the destination, those may have a reverse/forward check and if you remove mail A record, those outgoing emails might be rejected.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
jag bAuthor Commented:
All works fine now - previous IT company n guy had incorrect dns records :)
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.