> -----Original Message----- > From: Jake Colman > Sent: Saturday, June 14, 2003 10:06 PM > Subject: Re: Configuring sendmail as a backup relay > > > >>>>> "SC" == Steve Cowles <Cowles> writes: > > >> > >> 2) On the backup up mail server, configure sendmail.mc to > >> uncomment the line containing "FEATURE(`relay_based_on_MX')dnl". > > SC> The relay_based_on_MX feature is not needed. > > But would it work? I guess I am now confused as to what that > feature does.
I don't use this feature, so I cannot comment on weather or not it would work. You can read about this feature (and all the other sendmail features) in the cf/README file. Hint: Load the sendmail-cf RPM. > > SC> 1) Add an entry to your mailertable file: > > SC> mydomain.com esmtp:[ip of primary mail server] > > 'mydomain.com' would be the domain for which this box will be a relay, > correct? Yes! > 'ip of primary mail server' would be the box that > handles the domain normally, correct? Yes! > Can it a dns name instead of its IP address? Yes! Just don't include the brackets. i.e. mydomain.com estmp:mx2.mydomain.com BTW: The mailertable format is documented in the cf/README file metioned above. > > SC> 2) Then add mydomain.com to /etc/mail/relay-domains. > > SC> Whatever you do... do NOT add mydomain.com to > /etc/mail/local-host-names. > > SC> 3) Rebuild the mailertable database and then restart sendmail > > How? # cd /etc/mail # make BTW: Rebuilding the mailertable database (and the other sendmail database files) is documented in the cf/README file. > > SC> FWIW: There is a second option (this is what I do). > Use the DSMTP > SC> mailer. > > Is 'dsmpt' part of the standard sendmail package? Yes! > Or is this an alternate package? It's simply an alternate mailer definition. > If I use esmtp per your first suggestion, how it > function if the primary sendmail is down? Using the esmtp mailer... sendmail will first try to deliver the e-mail to the primary. If the primary is down, it will queue the e-mail. The queued e-mail will then be subjected to the standard sendmail queue runs (and possible DSN's) for final delivery. i.e once an hour -or- manually by typing: sendmail -q > You imply that only dsmtp will queue. Thats correct! The DSMTP mailer will simply queue all e-mail for the domain specifed. No delivery attempts will ever be made until you release the queued mail by issuing an ETRN as outlined in my previous reply to your post. Steve Cowles -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://www.redhat.com/mailman/listinfo/redhat-list
