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Ok, i've been seeing this the last week, tought it could be gone in a few days by itself, since i wasn't blacklisted and my DNS entries are all ok, but when i try to send e-mails to some user at Outlook, Live or Hotmail, i get this:

2015-02-11 14:54:58 1YLaYz-0000IT-I1 H=localhost.localdomain (higipel.com.br) []:41242 Warning: "SpamAssassin as cpaneleximscanner detected OUTGOING smtp message as NOT spam (-1.0)"
2015-02-11 14:54:59 1YLaYz-0000IT-I1 <= teste@higipel.com.br H=localhost.localdomain (higipel.com.br) []:41242 P=esmtpa A=dovecot_login:teste@higipel.com.br S=3532 id=5f640648ff1df4f59148f5c9cbbbd67b@higipel.com.br T="Lorem Ipsum" for [privarypreserved]@outlook.com
2015-02-11 14:54:59 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1YLaYz-0000IT-I1
2015-02-11 14:54:59 1YLaYz-0000IT-I1 SMTP connection outbound 1423673699 1YLaYz-0000IT-I1 higipel.com.br [privarypreserved]@outlook.com
2015-02-11 14:54:59 SMTP connection from localhost.localdomain (higipel.com.br) []:41242 closed by QUIT
2015-02-11 14:55:01 1YLaYz-0000IT-I1 => [privarypreserved]@outlook.com R=dkim_lookuphost T=dkim_remote_smtp H=mx1.hotmail.com [] X=TLSv1:AES256-SHA:256 C="250  <5f640648ff1df4f59148f5c9cbbbd67b@higipel.com.br> Queued mail for delivery"
2015-02-11 14:55:01 1YLaYz-0000IT-I1 Completed

And the weird thing is, i have a few hundred domains under 3-4 IP's at most, but just 4-5 domains are presenting this 'problem'

Anyone found a solution for this yet?

marked as duplicate by Jenny D, mdpc, Reaces, Michael Graff, HBruijn Dec 17 '15 at 22:36

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  • 2
    Did you look in "Junk"? – Michael Hampton Feb 11 '15 at 17:16
  • Yes, several times, even a day after i sent the test e-mail, not even a clue of the e-mail in there. :/ – Jorge Ferrari Feb 11 '15 at 17:19
  • 1
    The solution is to boycott these providers. They talk about free market, let's do it. (When I know of a solution, I'm sure I'll post it here) – sebix Feb 12 '15 at 17:04
  • 1
    @JorgeFerrari Do you have SPF and DKIM in place? – sebix Feb 15 '15 at 9:37
  • 1
    Have a look at this Q&A: serverfault.com/questions/536079/… – Alexey Krasheninnikov Feb 17 '15 at 12:42

It's because of Microsoft's SmartScreen.

You gotta be in concordance with these topics:

  • Setup a SPF record
  • Setup DKIM
  • Setup a DMARC record
  • Setup a reverse DNS record
  • HELO must be a host name not an IP
  • Make sure that your IP is not on a blacklist
  • Use a static IP address for your server
  • Sign up for JMRP and SNDS

I've followed this article, which solved the same problem you're having.

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