• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 286
  • Last Modified:

use same server with multiple mx records over multiple connections

Hi,

I have two internet lines from two different ISPs.

I use the first one all the time, and secound one is for backup in times that first one is not working.

I have an email server on my network. [Microsoft Exchange]

Is it possible to set two MX records on my DNS. [DNS server is hosted else were] with different priorities. so if first internet connection fails, emails go to second connection?

does this create a loop?

Thanks
Nav444
0
Nav444
Asked:
Nav444
  • 4
1 Solution
 
neoponderCommented:
Sure! actually,  That's what you should do!  Just add a second MX and give it a higher weight.  When an outside resolver fails to find the first MX (lowest weight) it we then try the second.  You can have as many as you like.  I have about 8!

0
 
neoponderCommented:
P.S. you can load balance by giving them the same weight...
Cheers!
0
 
neoponderCommented:
Question: when your first internet connection fails, are you implying that the ip range/email server on that network is unavilable?   you may want to get an AS number and use BGP to advertise out your network. That way, all of your servers/ip ranges are avilable no matter which connection is up.

0
 
ccomleyCommented:
Don't forget, however, to have a *third* MX pointing at an ISP mail server, so your mail still works even if your *server* rather than your 'net connection is unavailable for any reason. Unless you also have your own secondary server. Even then, it's best to have an off-site off-net MX available for your domain.
0
 
neoponderCommented:
Yes... if you have an ISP mail server.  All of ours is "In House".  Some people will setup a freeware mail system like "sendmail" and put it at peering site.  Unfortunatly that would violate our SarBox requirments.  :(

I hope some of this helps Nav444. Let us know!

0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now