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You will receive an email confirming your submission, and another confirming the changes are active after up to 48 hours. Once you have received confirmation the CFL is active, please notify Lead Liaison support. 

Customizing email headers

The other thing that can be done in order to help DMARC validate, is customizing the email from header. This means the emails will show as coming from bnc3.yourdomain instead of bnc3.mailjet.com

This only works if you are sending from one specific domain on your account instead of multiple, as every email sent by your account will use this new sending domain.

To get this setup, you would need to create a new DNS CNAME record

bnc3.yourdomain.com CNAME bnc3.mailjet.com

Once you have the DNS setting created, contact support and we will work to finish the setup.