RESOLVED: suddenly getting these in my mail.log: dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=external.com type=MX: Host not found, try again)

[Jeff Orrok]

Thanks Wietse! :-)

I changed all -'s to n's in master.cf chroot column and did a postfix 
reload and a postqueue -f and everything sailed away smoothly.

But I'm mystified as to why it would be working fine for an entire month 
and then out of the blue (well, ok, the client thinks there may have 
been a power failure) start to misbehave.  The date on master.cf was Jan 
24, which I think is when I installed it.  Why would it suddenly break?  
I've done postfix reload several times since installing, possibly even 
restarting postfix as well.

Jeff


On 3/1/2011 4:57 PM, Wietse Venema wrote:
See:
http://www.postfix.org/DEBUG_README.html#no_chroot

and please complain to your supplier.

        Wietse

--
Jeff Orrok
LXVI Internet Services LLC
866-598-4638