Hello @RickL64 ,
Our devs are looking into reported issues where some email addresses cause errors when used for the ?cc= coding in the pre-built email setup. It looks like you may have already sent us a DM on social media, if you could, please provide exactly what you were typing as a DM response there, we can submit this info to our devs for further investigation.
Otherwise, please email us at social_support(at)constantcontact(dot)com with:
In the meantime, the only workaround would be to leave off the ?cc= element from the rest of the pre-built email message.
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