DKIM selector entries for Office 365

StanD

• February 12, 2019 11:42

Hi, Extremely new to cpanel and WHM so I apologize for any misinformation or stupid questions but... I am trying to add the two selector._domainkey entries into WHM for our Office 365 setup which from what I've read needs to use our onmicrosoft.com domain for the cname entries but after adding in the proper selector entry and clicking save, our domainname is automatically added to the end of the entry. How do I prevent it from doing this? Ex: I am adding.. selector1._domainkey 3600 IN CNAME selector1-domainname.com._domainkey.originaldomainname.onmicrosoft.com but after clicking save it is changed to.... selector1._domainkey 3600 IN CNAME selector1-domainname.com._domainkey.originaldomainname.onmicrosoft.com.domainname.com Thanks! Stan

• 

  StanD

  • February 14, 2019 13:15

  Nevermind, didnt realize I needed the period at the end. Thanks me. You're welcome me.

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  cPanelLauren

  • February 15, 2019 14:14

  Hi @StanD I'm glad to see you were able to resolve the issue, thanks for letting us know what fixed it as well!

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  ian salgado

  • February 04, 2025 03:44

  Hi, i'm still having issues with this.

  I need a cname record for dkim for office365

  i added a cname for a domain

  name = selector1._domainkey.domainx.com

  TTL = 300

  Type = CNAME

  Record = selector1-domainx-com._domainkey.domainx.onmicrosoft.com

  The record is added on the cpanel

  But after waiting for 30mins (given TTL = 5), the record still does not show.

  Can't figure out why this may be ?

  any ideas ?

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  rbairwell

  • February 04, 2025 07:13

  ian salgado :

  I assume the nameservers for the domain name are pointing at your cPanel server?

  Assuming your domain name is "example.com" , can you try (from your desktop/laptop):

  dig selector1._domainkey.example.com CNAME

  Do you get something like:

  ;; ANSWER SECTION:
  selector1._domainkey.example.com. 300 IN CNAME selector1-example-com._domainkey.example.onmicrosoft.com.

  back?

  If not, can you retry it in the format:

  # Windows PowerShell
  dig "@yourserver.example.com" selector1._domainkey.example.com CNAME
  
  # Other platforms
  dig @yourserver.example.com selector1._domainkey.example.com CNAME

  Replacing "yourserver.example.com" with your server's hostname (or IP address). Does that give the expected results?

  Third party servers (such a DKIM verifiers and mail servers) may cache DKIM results for a period of time so using a tool like dig to get "live" results it the best way.

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  ian salgado

  • February 04, 2025 22:49

  Hi rbairwell,

  So the short answer is no.

  i can't use dig command as this is a linux & we use windows.

  I have been using mxtoolbox which does the same thing.

  When i do the query, there is no cname records created, even though in the cpanel it shows up

  I tried a different cpanel with a different domain & it worked fine.

  But this particualr cpanel & domain do not work.

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