[NTLUG:Discuss] Multiple DNS records for POP3 and SMTP server?

[Tony]

On Thu, Oct 23, 2008 at 8:40 AM, Neil Aggarwal <neil at jammconsulting.com> wrote:
> Hello:
>
> This document:
>
> <http://www.barracudanetworks.com/ns/downloads/Barracuda_WP_MX_Load_Balancin
> g.pdf>
> http://www.barracudanetworks.com/ns/downloads/Barracuda_WP_MX_Load_Balancing
> .pdf
> gives a strategy for having multiple MX records to
> have redundancy for incoming email to get to my servers.
>
> I don't see anything that talks about doing the same
> thing for pop3 and smtp connections.

Your MX should be your smtp correct?

>
> If I have multiple A records for these:
>
>        pop3.JAMMConsulting.com A 1.2.3.4
>        pop3.JAMMConsulting.com A 5.6.7.8
>
>        smtp.JAMMConsulting.com A 1.2.3.4
>        smtp.JAMMConsulting.com A 5.6.7.8
>
> and then set Outlook (I use version 2003) to
> use pop3.JAMMConsulting.com and smtp.JAMMConsulting.com
> as its incoming and outgoing server, will Outlook
> whichever IP address is available if one of them
> is down?

I am not sure this would work. But i know you could look into Round
robin DNS to possibly accomplish this.
http://en.wikipedia.org/wiki/Round_robin_DNS