Re: [cobalt-users] Sendmail Fallback MX (was: How can I forward all mail for adomain to another mail server)

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

SM wrote:

> You need to add an additional MX record with a higher weight to your DNS
> entry for that domain and point it to the offite host.  On the offsite
> host, add your domain name in the /etc/mail/relay-domains file.  You will
> also have to create an mailertable entry and and have it point to your site
> to avoid a MX loop on the offsite host.

I'm busy studying that now, SM, and have posted some questions to some
sendmail lists.  Do you really need the mailertable entry?  At least one
sendmail book says no, that sendmail will never send mail to a host with
the same mx "weight" or higher, only lower.

> >Secondly how can I keep a copy of all the mails sent to this
> >domain for appx 7 days before deleting them?
> 
> Sendmail will keep the mails for 5 days before deleting them.  You can
> modify that setting (O Timeout.queuereturn=7d) in the sendmail.cf.

Only if they're undeliverable because of a temporary outage/error.  I
think he wants delivered mail and mail returned immediately with a
permanent error kept as well.

Jeff
-- 
Jeff Lasman <jblists@xxxxxxxxxxxxx>
nobaloney.net
P. O. Box 52672, Riverside, CA  92517
voice: (909) 787-8589  *  fax: (909) 782-0205