(Sorry if a dupe gets through, but I sent this last night and still not
appearing on the list so trying again:)

Hi All,

I've always run with BOFHCHECKDNS successfully, but after recently
upgrading my debian packages form courier 0.61 to courier 0.63, courier
suddenly started rejecting all domains for both inbound and outbound
mail.  A small sampling:

Jan 25 07:58:25 aloha courieresmtp:
id=00000000032E4D3E.000000004B5D8509.00000D76,from=<logch...@*manawiz.com*>,addr=<[email protected]>:
DNS lookup failed.
Jan 25 09:20:06 aloha courieresmtp:
id=00000000031FC00E.000000004B5DEDBA.000064D0,from=<s...@*wisdombell.com*>,addr=<[email protected]>:
DNS lookup failed.

Jan 24 18:27:41 aloha courieresmtpd:
error,relay=::ffff:209.85.210.189,from=<[email protected]>: 417 DNS
lookup failure: *gmail.com*.  Try again later
Jan 24 18:28:02 aloha courieresmtpd:
error,relay=::ffff:209.85.222.148,from=<3wr1dswaaeyclyo2zto-mprtyyp23rzzrwpr2z503....@groups.bounces.google.com>:
417 DNS lookup failure: *groups.bounces.google.com*.  Try again later.
Jan 24 18:49:08 aloha courieresmtpd:
error,relay=::ffff:64.79.150.121,from=<[email protected]>: 417
DNS lookup failure: *netbeans.org*.  Try again later.

Setting BOFHCHECKDNS=0 of course resolves this, but also lets in more
spam, so I'd like to find a way to fix the problem.

DNS is configured and working fine on the server, e.g.:

aloha:/etc/courier# dig +short MX gmail.com
30 alt3.gmail-smtp-in.l.google.com.
40 alt4.gmail-smtp-in.l.google.com.
5 gmail-smtp-in.l.google.com.
10 alt1.gmail-smtp-in.l.google.com.
20 alt2.gmail-smtp-in.l.google.com.
aloha:/etc/courier# dig +short A alt3.gmail-smtp-in.l.google.com
209.85.218.11
aloha:/etc/courier# dig +short MX groups.bounces.google.com
5 gmr-smtp-in.l.google.com.
10 alt1.gmr-smtp-in.l.google.com.
10 alt2.gmr-smtp-in.l.google.com.
aloha:/etc/courier# dig +short A gmr-smtp-in.l.google.com
209.85.221.205
aloha:/etc/courier# dig +short MX manawiz.com
0 manawiz.com.
aloha:/etc/courier# dig +short A manawiz.com
64.34.170.220
aloha:/etc/courier#

What could cause this?  I've search for prior instances of BOFHCHECKDNS
issues and haven't seen anything like this.

Nor have I seen a clear explanation of how courier checks DNS or exactly
what it checks.  That would be illuminating.

Thanks for any help,

Chuck


-- 
*Chuck Williams*
Manawiz
Principal
V: (808)889-6789
C: (808)854-9278
[email protected] <mailto:[email protected]>
Skype: manawiz
AIM: hawimanawiz
Yahoo: jcwxx

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