FYI: This "Multi Domain DKIM Authentication" community string was first started in 2020. At that time authentication of custom domain names wasn't available at Constant Contact but was a requested, optional feature. Customers could still utilize multiple custom domain names within 1 account when sending emails. In early 2024 Google and Yahoo started requiring email authentication. As a result Constant Contact required that all custom domain names be authenticated, to continue using them, but failed to accommodate for accounts which were utilizing more than 1 custom domain. Currently we are limited to authenticating only 1 custom domain per account and as such we are limited to use of 1 custom domain. "..@shared1.ccsend.com" can also be utilized but this is not good branding in most cases. One option is to buy separate accounts to accommodate each custom domain name. This is impractical, time wasting and far more costly than alternative competing products where only 1 account is needed and paid for. While this "Multi Domain DKIM Authentication" string was first started in 2020, as of 2024 the issue is not a lack of DKIM Authentication but how accounts are now being restricted due to only 1 authentication being possible.
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