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
