Thanks Stefan,
The Debian packages of Postfix are running smtpd in a chroot by
default. The files necessary for this are copied by the init script
/etc/init.d/postfix - and amongst them is the resolv.conf you changed.
It's exactly this. The chroot has its own copy of (caches) resolv.conf.
Re
Wietse Venema:
Apparently postfix missed the switching of nameservers and did not learn
of the new DNS until restart. Is this a bug or a feature?
Like most programs, Postfix never reads /etc/resolv.conf.
Yes, I suspected that.
Instead, that file is read by the NSSWITCH system library
I had a quite strange issue. About a week ago my bind9 broke down and I
could not get it running again on the same machine. So moved it to
another machine and changed the /etc/resolv.conf of my machines to try
both IP. Apparently everything worked fine.
Today I was puzzled that the correspondi
