On Sat, Mar 04, 2017 at 05:18:53PM -0500, Viktor Dukhovni wrote: > > On Mar 4, 2017, at 4:50 PM, Maurizio Caloro <mauri...@caloro.ch> > > wrote: > > > > If i send any mail go @hotmail this will never arrive, but > > Postfix Log are here in other thing. snip > > Hotmail took responsibility for delivery of the message. If it > never showed up in the user's mailbox, perhaps Hotmail considers > your IP address sufficiently "spammy" to discard your mail. > > Create a Hotmail account for yourself, and send the mail there, see > if it arrives. There's not much Postfix can do to get Hotmail to > not discard your mail.
On the idea from someone in IRC, and working in conjuction with a colleague who was a Hotmail user, I confirmed that Hotmail was discarding my mail if it had only one Received: header. Sounds crazy, and really, it is. Adding a forged Received: header, just as many spammers do, landed me in his Inbox. Go figure. This was a whole decade ago, so no telling what might have changed in the meantime. Oh, and I was also able to reply to his originated mail. Their content filter looked for In-Reply-To: and/or References: also. > Some people advocate publishing SPF records and using DKIM > signatures. Though my mail gets delivered without either, > perhaps these would help your mail not get junked. I think it's still mostly about IP reputation, which changes very slowly, especially at big receivers like Microsoft. -- http://rob0.nodns4.us/ Offlist GMX mail is seen only if "/dev/rob0" is in the Subject:
