On Fri, Sep 18, 2020 at 07:33:24PM -0700, [email protected] wrote:
> I've got a postfix box. It's accepting external mail fine. [And has been for
> some time.]
> It's pointed at a couple of caching name-servers in the local network.
> Lets call them NS1 NS2.
> NS1 is primary and NS2 is secondary.
>
> Recently I noticed that when NS1 is down, postfix won't accept mail.
Disable default domain suffixes in /etc/resolv.conf (and any copy in
/var/spool/postfix/etc if smtpd(8) is chrooted in master).
/etc/resolv.conf:
domain .
search .
...
> Yet digs from postfix get handled by NS2 fine, while NS1 is down.
Your forward and/or reverse zones may not be mirrored on the secondary,
or may be expiring too quickly.
--
Viktor.
