The sync shows error messages in the log and the contact is not being transferred to Mailchimp. Why is that?

If Mailchimp doesn’t accept a contact during a sync you’ll find an error message in the Marketing&Chat log and the contact will end up in the “Errors” subgroup in Daylite.

In most cases Mailchimp doesn’t accept a contact due to one of the following reasons:

• an email address bounced (i.e. receiving mail server rejected the mail) during a previous mailing and has therefore been removed from the subscribers list on mailchimp.com. In order to re-add such a contact, you will need to delete this contact from the “cleaned” list on mailchimp.com first (select Mailchimp list -> “Subscribed drop-down menu -> Cleaned).
• a contact has no email address
• a contact’s email address is not set as the primary address in Daylite
• a contact’s email address contains leading or trailing whitespace
• generic “role” addresses such as “info@, sales@, webmaster@, etc” are not accepted by Mailchimp.