mail issues when link is lost

[Oluwagbenga Shobowale]

Thanks, but all the clients are windows and point to the local mail server not the ISP. Yes I am using the ISP server as a smart host.
My point is I have configure the outlook to point to the local mail server 192.168.0.1 
When mails are sent from the clients it gets delivered to both external and internal mails as long as the internet link is up. If now only local domain mails get delivered. External mails at that point don't leave the clients.
Thanks
Sent from my BlackBerry® smartphone from Zain Nigeria

-----Original Message-----
From: "Carl T. Miller" <carl at carltm.com>
Date: Tue, 13 Apr 2010 07:45:49 
To: <redhat-sysadmin-list at redhat.com>
Subject: Re: mail  issues when link is lost

Oluwagbenga Shobowale wrote:
> Could you help me out with this. I have a mail server which uses sendmail,
> however we relay all our mail to our ISP to save bandwidth as this traffic
> is free with our ISP. However, when the link fails we realize that we can
> send mails locally but not externally. Is there a way to configure
> sendmail
> to retain  the mails on the mail server and send when the link is
> available.
> Right now the mails remain on the client machine and are not delivered to
> the server until the link is back up, well except for the local domain.

If I understand this, you have a mail server using your ISP's
mail server as its smarthost.  However, your client machine
is not configured to use a smarthost.  I would suggest that
you configure your client machine to use your mail server as
a smarthost, since that will make it easier to troubleshoot
problems and will give you one point where all outbound email
is queued when your connections is down.

c


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