Website: www.constantcontact.com


Aligned Authentication Method:

SPF - No

DKIM - Yes - TXT


Constant Contact sometimes requires a support ticket opened with them. CC admins will generate an individualized DKIM key for each Constant Contact account.


Constant Contact's instructions are here:

https://knowledgebase.constantcontact.com/guides/KnowledgeBase/5932-self-publishing-for-authentication?lang=en_US#Create


Once the DKIM key is published, Constant Contact will automatically detect this and begin to DKIM sign emails