[CentOS] Alias for sending email messages from root

[Les Mikesell]

On Tue, Jan 29, 2013 at 4:03 PM, James B. Byrne <byrnejb at harte-lyne.ca> wrote:
> I have run into what can only be described as a farce but one that is
> outside my control and which I need fixed.
>
> I am informed that my cell phone service provider, Bell Canada, will
> not allow any email messages from a user id 'root' to pass through
> their email to sms text gateway.  Now, I send alerts out from cron and
> other system monitoring software and these all go out as
> root at host.domain.tld.
>
> Is there any way to configure the outgoing address to be something
> else?  Or do I have to rename the root user to get around this
> nonsensical, and utterly useless, restriction imposed by my provider?

First, are you sure that the @host.domain.tld is really included for
root?   If you are relying on sendmail's 'MASQUERATE_AS', you have to
make sure that you remove root from the EXPOSED_USER default setting.

Otherwise see 'man 5 crontab' for how to set MAILFROM, or if you are
mailing in a script, construct the headers yourself and use 'sendmail
-t' to use them instead of using the unix user as the sender.

-- 
   Les Mikesell
     lesmikesell at gmail.com