> On 15 Apr 2025, at 18.03, Alessandro Vesely <ves...@tana.it> wrote:
>
> On Tue 15/Apr/2025 15:54:05 +0200 Stephane Bortzmeyer via bind-users wrote:
>> On Tue, Apr 15, 2025 at 02:54:33PM +0200,
>> Alessandro Vesely <ves...@tana.it> wrote
>> a message of 46 lines which said:
>>> last night I sent 4 complaint messages to vodafone.com. The first one
>>> bounced like so:
>> Note that the name servers for mail.protection.outlook.com (the target
>> of the MX record) are quite broken, they return FORMERR for EDNS
>> questions. It may create problems.
>> % dig @ns2-proddns.glbdns.protection.outlook.com.
>> vodafone-com.mail.protection.outlook.com A
>> ; <<>> DiG 9.18.33-1~deb12u2-Debian <<>>
>> @ns2-proddns.glbdns.protection.outlook.com.
>> vodafone-com.mail.protection.outlook.com A
>> ; (1 server found)
>> ;; global options: +cmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: FORMERR, id: 20571
>> ;; flags: qr rd; QUERY: 0, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
>> ;; WARNING: recursion requested but not available
>> ;; WARNING: EDNS query returned status FORMERR - retry with '+noedns'
>> ;; Query time: 12 msec
>> ;; SERVER: 104.47.72.81#53(ns2-proddns.glbdns.protection.outlook.com.) (UDP)
>> ;; WHEN: Tue Apr 15 15:53:29 CEST 2025
>> ;; MSG SIZE rcvd: 12
>
>
> Hm... so perhaps those were not timeouts but FORMERRs? However, the other
> three messages, following at a few minutes apart, were sent all right.
>
> My other concern is why I cannot understand it from the query log.
You could look at the mail log - that may state why that message was not sent.
Potentially state that the receiver was not found or something like that or
something else.
Also the first message could have happened upon a worse DNS server than the
next.
>
>
> Many thanks, also to Sten and Michael.
> Best
> Ale
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