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Marketo note

You may need the help of your IT team to complete some of the steps in this article.

Numbered Headings

In order to ensure top-notch deliverability, we automatically sign all outbound mail with a shared Marketo DKIM signature.

You can personalize the DKIM signature if you like to reflect the domain(s) of your choice. Here is 's how:.

Go to the Admin section.

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Marketo note

If you set up a custom DKIM signature the old-fashioned way, it will continue to work and should show up here.

Click Email, then the DKIM tab, and
finally Add Domain.

Enter the domain you will be using in
Marketo emails as the From Address and click 


Marketo tip

If you use a different domain in your From Address, we will use the Marketo shared DKIM signature.

Send the Host Record and TXT Value to your IT. Ask them to create the record for you.

Once they confirm they
've created the record, come back to Marketo, select your domain, and click Verify DNS.


Marketo reminder

If the confirmation fails and your IT has created the record correctly, it may be a matter of DNS propagation. Try again later.


Marketo caution

Modifying/removing the corresponding DNS record will result in harmed deliverability. Make sure to delete the entry in Marketo before making DNS changes.

This will absolutely help with your email deliverability. You should get validation that the record is there and correct.