On 02/10/14 16:16, li...@rhsoft.net wrote: > > 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
Hello, thank for your reply, but I'm aware of that and I'm not surprised by the behavior of my Postfix instance, and if you would have read my mail till the end, you would have known it: On 02/10/14 16:10, Daniele Nicolodi wrote: > So, it seems that hotmail is trying to send something to the forwarded > address, but in a weird way, which seems to be correctly rejected by > my Postfix server. I had a look at a few examples of this, and the timing are such that it is almost impossible that this is not coming from Microsoft servers. My curiosity is about why they do that in the way they do and what they want to deliver to the forwarding address. Cheers, Daniele
