Re: [cobalt-users] Sendmail Fallback MX

[SM <nntp@xxxxxxxxx>]

At 10:07 21-08-2001 -0700, Jeff Lasman wrote:
>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.

Sendmail should send mail (for the domain) to a host with a lower MX
weight.  The short answer is no, you do not need the mailertable entry.

I have seen MX loops on secondary (Sendmail) MTAs in some cases.  I suggest
adding mailertable entry if you get the MX loop error.  Having a
mailertable entry also makes sense as Sendmail does not have to perform a
MX lookup when sending mail from the secondary to a host receiving mail for
that domain.

>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.

I think I misread the question.  There are cf hacks to keep a copy of all
mail.

Regards,
-sm