Hotmail label all the emails as junk

Good day! I have a seriously problem. I don't understand why it's happens but only Microsoft mail services (outlook, hotmail, live) put the emails what is send from my mail server to the junk folder. I did a check with mxtools to see if there is something wrong with the mailserver setup, mailheaders or if we a listed on the spam blacklist somewhere in the world. But everything was fine.

So what kind of things I can do check more?

 

Try installing DKIM on your mail server. This is also recommended for gmail and some other services.

 

Okey, I don't have DKIM yet... is't easy to install? Do you have a good tutorial for me?

 

I have ISPConfig 3.0.5.4p8 installed. How can I check if DKIM is enable?

 

Thank you! It's installed now. Because I do the DNS separate I need to update the DNS records with the DKIM records. Then I like todo a test and see if its working and configured it right.
Amavis and Postfix are reload during the installation? I don't sure...

 

Okey, DKIM is now added and add the public key to the DNS. When the DNS updated everywhere I do a test again and see if this solved the problem. I will update this from topic this afternoon.

 

Well its now amost 15:00 but still outlook.com don't except my email even if DKIM is enable and add to the DNS records.
Still Outlook put this in the header:
Authentication-Results: hotmail.com; spf=pass (sender IP is XX.XX.XX.XX) smtp.mailfrom=[email protected]; dkim=none header.d=domainname.nl; x-hmca=pass header.id=[email protected]

So dkim=none, that is strange or?

 

I don't see strange things in the mail logs e.g. dkim errors. So that must be okey then. Any ideas?

 

I think I found the issuse:

# amavisd-new testkeys
TESTING#1: default._domainkey.domainkey.nl => invalid (public key: not available)
TESTING#2: default._domainkey.domeinkey.nl => invalid (public key: not available)

Because my DNS provider says:
add 'default_domainkey' as txt record instead of 'default._domainkey'

 

The values is always "default._domainkey.DOMAIN."....
Beside this: DKIM may help but should take of other mail-related-settings. klick

And the installer restarts amavis and postfix....

 

Okey, DNS is now change. Amavis says:

TESTING#1: default._domainkey.domainname.nl => pass
TESTING#2: default._domainkey.domainname.nl => pass

But still outlook.com says:
Authentication-Results: hotmail.com; spf=pass (sender IP is XX.XX.XX.XX) smtp.mailfrom=[email protected]; dkim=none header.d=domainname.nl; x-hmca=pass header.id=[email protected]

Or Outlook is slow in renew DNS or its still not good

 

Please check the dkim-signing as described here

 

Yes, I did the test and everything is good. I waiting for my test mails send to port25. But I think that everything is good. So its microsoft I think.

 

The Port25 Solutions, Inc. team

==========================================================
Summary of Results
==========================================================
SPF check: pass
DomainKeys check: neutral
DKIM check: neutral
Sender-ID check: pass
SpamAssassin check: ham

 

Unlock the Inbox says:

Publication: RFC 6376
DKIM Check
Tag Value
Signature Found: Not Found - Learn how to set up DKIM by clicking here: DKIM Instructions

 

It seems, that your public-key was not available through dns.