li...@rhsoft.net wrote on 10/2/2014 9:16 AM:
Am 02.10.2014 um 16:10 schrieb Daniele Nicolodi:
I have a system with a few local users where some of them are configured
for forwarding all incoming messages to external addresses via the use
of .forward.
One of those users forwards mail to an hotmail.com address.
When mail is delivered to this address this is what happens:
Oct 2 13:50:58 zed postfix/smtpd[1063]: connect from
bay004-omc1s27.hotmail.com[65.54.190.38]
Oct 2 13:50:59 zed postfix/smtpd[1063]: NOQUEUE: reject: RCPT from
bay004-omc1s27.hotmail.com[65.54.190.38]: 450 4.1.8
<account-security-nore...@account.microsoft.com>: Sender address rejected: Domain not found;
from=<account-security-nore...@account.microsoft.com> to=<r...@grinta.net> proto=ESMTP
helo=<BAY004-OMC1S27.hotmail.com>
Oct 2 13:50:59 zed postfix/smtpd[1063]: disconnect from
bay004-omc1s27.hotmail.com[65.54.190.38]
there is no "account.microsoft.com" A-record and also no MX record
so @account.microsoft.com is not a valid sender
if that comes directly from a microsoft server they need to learn
that a valid sender needs to accept mail which is not possible without
DNS records as others learned in the past
sender adress verification as well as "reject_unknown_sender_domain"
reject such mails, for good reasons and not uncommon used
FYI, Microsoft took records for account.microsoft.com out of DNS
yesterday. I attempted to reach someone at Microsoft that was clueful or
helpful, but had no success at either.
Current queries return no answer:
# dig @8.8.8.8 any account.microsoft.com
; <<>> DiG 9.9.4-RedHat-9.9.4-14.el7 <<>> @8.8.8.8 any account.microsoft.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26951
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;account.microsoft.com. IN ANY
;; AUTHORITY SECTION:
microsoft.com. 1799 IN SOA ns1.msft.net.
msnhst.microsoft.com. 2014100205 7200 600 2419200 3600
;; Query time: 33 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Oct 02 10:50:34 CDT 2014
;; MSG SIZE rcvd: 105
--blake
