Postfix Name service error

[mydigitalself]

hi all
i'm having a problem that started about a week ago with my postfix setup. i don't remember changing anything in the config that could have affected this, but maybe somebody could point me in the right direction...

i run postfix on a dialup box that gets a dynamic ip from my isp. as a result i often can't send SMTP mail directly owing o RBL rules and so on.

what i do is i use a box of mine on a backbone to relay all my mail, which has worked pretty well: until now.

here is what i see in my maillog:

May 8 11:21:32 shiraz postfix/qmgr[20686]: AFCCEF40F9: to=<xxx@xxx.com>, relay=none, delay=0, status=deferred (Name service error for mail.xxx.xxx: Host not found, try again)

if i dig mx xxx.xxx.xxx i get:

;; QUESTION SECTION:
;xxx.xxx.xxx. IN MX

;; ANSWER SECTION:
xxx.xxx.xxx. 553 IN MX 10 yyy.yyy.yyy.
xxx.xxx.xxx. 553 IN MX 10 yyy.yyy.yyy.

it would appear that postfix, for some reason, is not able to do a lookup correctly or something. does anyone have any ideas?

cheers
michael

[JimH]

Hmmm, never used Postfix, but it looks like it is just a DNS problem. From what this says since Postfix runs in a chrooted jail it uses /var/spool/postfix/etc/resolv.conf not /etc/resolv.conf thats why dig doesn't fail.

Have a look at this.
http://www.linuxgazette.com/issue77/tag/6.html

Jim H