DNS hiccups

[Sten Carlsen]

Thanks

Sten

> On 15 Apr 2025, at 14.54, Alessandro Vesely <vesely at tana.it> wrote:
> 
> Sorry for cross-posting -- mind it before replying.
> 
> 
> Hi,
> 
> last night I sent 4 complaint messages to vodafone.com.  The first one bounced like so:
> 
> Your message to the following recipients cannot be delivered:
> 
> <abusevfgr at vodafone.com>:
> <<< No such domain.
> 
> The bounce has Date: Tue, 15 Apr 2025 05:21:45 +0200, the query log says:
> 
> 15-Apr-2025 05:21:34.546 queries: info: client @0x7ff24383d168 ::1#44623 (_mta-sts.vodafone.com): view internal: query: _mta-sts.vodafone.com IN TXT + (::1)
> 15-Apr-2025 05:21:34.658 queries: info: client @0x7ff24383d168 ::1#54836 (vodafone.com): view internal: query: vodafone.com IN MX + (::1)
> 15-Apr-2025 05:21:34.686 queries: info: client @0x7ff24224d168 ::1#52645 (vodafone-com.mail.protection.outlook.com): view internal: query: vodafone-com.mail.protection.outlook.com IN AAAA + (::1)
> 15-Apr-2025 05:21:35.526 queries: info: client @0x7ff24224d168 ::1#56049 (vodafone-com.mail.protection.outlook.com): view internal: query: vodafone-com.mail.protection.outlook.com IN A + (::1)
> 15-Apr-2025 05:21:40.534 queries: info: client @0x7ff2422f9168 ::1#56049 (vodafone-com.mail.protection.outlook.com): view internal: query: vodafone-com.mail.protection.outlook.com IN A + (::1)

All of this is the internal view. It suggests that there is some misconfiguration in that view.

From my location I see no issue:

carlsen at Silver9-106 ~ % dig vodafone.com mx

; <<>> DiG 9.10.6 <<>> vodafone.com mx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29271
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;vodafone.com.			IN	MX

;; ANSWER SECTION:
vodafone.com.		3600	IN	MX	10 vodafone-com.mail.protection.outlook.com.

;; Query time: 36 msec
;; SERVER: 192.168.16.20#53(192.168.16.20)
;; WHEN: Tue Apr 15 15:15:45 CEST 2025
;; MSG SIZE  rcvd: 97

carlsen at Silver9-106 ~ % dig vodafone-com.mail.protection.outlook.com 

; <<>> DiG 9.10.6 <<>> vodafone-com.mail.protection.outlook.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3165
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;vodafone-com.mail.protection.outlook.com. IN A

;; ANSWER SECTION:
vodafone-com.mail.protection.outlook.com. 10 IN	A 52.101.68.32
vodafone-com.mail.protection.outlook.com. 10 IN	A 52.101.68.27
vodafone-com.mail.protection.outlook.com. 10 IN	A 52.101.73.26
vodafone-com.mail.protection.outlook.com. 10 IN	A 52.101.73.22

;; Query time: 114 msec
;; SERVER: 192.168.16.20#53(192.168.16.20)
;; WHEN: Tue Apr 15 15:18:56 CEST 2025
;; MSG SIZE  rcvd: 133

> 
> 
> I guess the A queries failed.  Isn't it possible to log the return code or something?
> 
> There is no AAAA record.  The A queries seem to have timed out after 5, although in resolv.conf I have "options timeout: 10".  IIRC Courier does read resolv.conf.  Why didn't it wait 10?
> 
> 
> This is BIND 9.18.33-1~deb12u2-Debian and courier-1.3.13.20241204.
> 
> TIA for any comment.
> 
> Best
> Ale
> -- 
> 
> 
> 
> 
> -- 
> Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list
> 
> ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.
> 
> 
> bind-users mailing list
> bind-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/bind-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/bind-users/attachments/20250415/486eb5bd/attachment-0001.htm>