Redundant ISP for Email Server

I have one Exchange 2010 Server 2008R2 on a local domain (domain.local) with two ISP.
Isp 1 has the DNS and PTR set already as mail.domain.com. I would like to setup my second static ip to have the same settings as my first, so that if the first goes down my service remains live (don't know if this can create a conflict)

Questions:
1. How do I configure the second IP record? would it be mail1.domai

Open in new window

n.com to the static IP?
if so can't I use the same mail.domain.com to resolve both IP's rather than mail.domain.com AND mail1.domain.com?

2. Does the mail.domain.com AND mail1.domain.com make a difference with any configurations I may have to do on my Exchange 2010 servers?

Please advise urgently.
civirAsked:
Who is Participating?

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

x
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.

Scott CSenior EngineerCommented:
1. Just add another send connector with a higher cost and assign the failover server to it. Name it "Backup to Internet" or something. Address space = "*". Include your smart host. Etc.

2. In DNS, update your current TXT record for the SPF validation. http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/

You probably know this, but make sure port 25 isn't being blocked as well.
civirAuthor Commented:
What do I put in the FQDN? would I put the mail1.domain.com and used the same mail1.domain.com with my redundant IP for DNS/PTR creation?
Scott CSenior EngineerCommented:
Yes, I believe so.
Acronis True Image 2019 just released!

Create a reliable backup. Make sure you always have dependable copies of your data so you can restore your entire system or individual files.

civirAuthor Commented:
With my redundant IP and exchange:  if I set my second ip to mail1.domain.com will this affect my current OWA that is mapped to mail.domain.com and if so How can I ensure my OWA is up when I switch to my secondary IP when my mail.domain.com linked to my OWA goes down.
Scott CSenior EngineerCommented:
While using OWA, you'd have to use mail1.domain.com/OWA as you would be coming in another way.
Simon Butler (Sembee)ConsultantCommented:
A second Send Connector isn't going to work.
Furthermore, unless you have a dual WAN router, the server isn't going to be able to use the second connection.

What I have done in the past is to have all outbound email route via a smart host - that could be a spam filtering service or another server under my control in a data centre. Then it doesn't matter what route the email goes out.
Inbound email is easy with two MX records. The host name used by the clients can have both IP addresses in the DNS record, but DNS cannot provide failover.
Therefore if you want connections to be guaranteed, look at deploying either your own load balancer in a data centre or cloud load balancing service.

Simon.

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
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
Exchange

From novice to tech pro — start learning today.