O365_SetupDKIM.md

Setup DKIM for your new domain on O365

1. Login to your linux server and add the 'selectors' :

$ssh sd-53250.dedibox.fr

2. Edit /etc/bind/db.enrollme.eu, add the below at the end of the file :
   Make the change to reflect your domain...

;MICROSOFT DKIM
selector1._domainkey	3600	IN	CNAME	selector1-enrollme-eu._domainkey.enrollme.onmicrosoft.com.
selector2._domainkey	3600	IN	CNAME	selector2-enrollme-eu._domainkey.enrollme.onmicrosoft.com.

/!\ Be sure you didn't make any mistake, if you have to edit file after asking Microsoft it will take time to be taking into account... (my case it took me a couple of hours before being able to enable it.

3. Save the file, close it, restart bind service :

$sudo /etc/init.d/bind9 restart

4. Go to google to force flush cache, put your domain name then in RRType CNAME, because selectors are CNAME records :
   

5. Go to Office 365 admin portal :
   

6. On the left menu Click on Exchange :
   

7. Under section Protection click on dkim :
   

8. Under section :
   

9. Select your domain, and click on enable on the right, if you see the below wait few minutes to few hours ( I had to wait ~1h) :
   

10. Wait and click on enable again, You shall see this :
    

11. Now we will check DKIM is well set, go here : http://dkimvalidator.com/

12. Copy the email address, in my case : PYTyc8NuJI1p41@dkimvalidator.com

13. Go to your outlook client or webinterface and login with your new email account for me ( enrollme.eu-verification@enrollme.eu ): Send an e-mail for email you copied on previous step @dkimvalidator.com .
    

14. Go back to dkimvalidator site, and Click on View Results

15. Verify tests passes

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