[colug-432] sendmail using wrong domain

[Richard Holbert]

Scott,

For email delivery, I usually set up an email alias for root in 
/etc/aliases.

man aliases

Also, I prefer postfix to sendmail.  Much easier to configure and maintain.

Rick

Scott Merrill wrote:
> Aloha.
>
> I have a Red Hat Enterprise Linux v5 system running as a virtual
> machine inside an ESX 4 cluster. The system is resolvable at both
> host.osu.edu and host.dept.ohio-state.edu. /etc/hosts defines
> host.osu.edu as the public IP address, and there is no specific entry
> for host.dept.ohio-state.edu.
>
> `hostname` returns host.osu.edu, and `dnsdomainname` returns osu.edu.
>
> When I send mail manually (`mail -s skippy at skippy.net test`), the
> message is sent from user at host.dept.ohio-state.edu.
>
> cron mails are failing to be delivered, because Sendmail is trying to
> send mail to root at host.dept.ohio-state.edu, but sendmail is not
> listening on that interface: it's only listening on localhost.
>
> I tried adding host.dept.ohio-state.edu to /etc/hosts as 127.0.0.1,
> but that didn't seem to work.
>
> Do I _have_ to edit /etc/mail/sendmail.mc to define a masquerade
> entry? Or is there another way for me to tell this system that is
> host.osu.edu, and should only ever use that address for sending mail?
> I want all mail to be sent from -- and delivered too --
> root at host.osu.edu. This machine only needs to send mail from cronjobs,
> and will not be a publicly accessible mail server.
>
> Thanks,
> Scott
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