Mike Chirico on 14 Dec 2007 17:18:37 -0000

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Re: [PLUG] Home Linux Box - Google Apps for email

  • From: Mike Chirico <mchirico@gmail.com>
  • To: Philadelphia Linux User's Group Discussion List <plug@lists.phillylinux.org>
  • Subject: Re: [PLUG] Home Linux Box - Google Apps for email
  • Date: Fri, 14 Dec 2007 12:18:24 -0500
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On Fri, Dec 14, 2007 at 09:51:58AM -0500, Isaac Bennetch wrote:
> Hi Mike,
> To make sure I understand your configuration correctly; you've got
> your DNS records pointing to your home-based Linux box for your MX
> record, which receives the mail then relays it to Google? I'm not
> quite sure I understand how your description fits together. Why relay
> through your local box at all instead of pointing the MX record to
> Google and not having to worry about your local server? For that
> matter, why use Google at all instead of running SquirrelMail or some

A record points to home Linux box for (ssh, web, etc).

MX record points to Google.

For an example, take a look at the linuxaddicted.org domain.

 $ dig cwxstat.org

 cwxstat.org.            256     IN      A

My home IP address is, but the MX record shown below points to google.

 $ dig cwxstat.org MX

cwxstat.org.            163     IN      MX      10 ASPMX4.GOOGLEMAIL.COM.
cwxstat.org.            163     IN      MX      1 ASPMX.L.GOOGLE.COM.
cwxstat.org.            163     IN      MX      5 ALT2.ASPMX.L.GOOGLE.COM.
cwxstat.org.            163     IN      MX      10 ASPMX2.GOOGLEMAIL.COM.
cwxstat.org.            163     IN      MX      10 ASPMX3.GOOGLEMAIL.COM.

> other webmail application at home? What happens if you have a local
> outage (upgrade, power failure, ISP outage); do you have a backup MX?

Google is the backup.  Any mail going to cwxstat.org goes to Google's
MTA, then, it's picked up by your local box via fetchmail.



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