We have noticed that some of our customers use email protection solutions such as Mailinblack. As a result, the emails we send are sometimes blocked for recipients who have not yet authenticated our domain.
Normally, when an email is considered potentially unwanted, the system would automatically send us a validation email to the configured reply address. This would allow us to reply and authenticate the message so that it would no longer be marked as spam and would reach our customers’ inboxes.
However, we haven’t received these validation emails on our reply address. Is this authentication feature handled correctly by Activ Campaign? Are emails sent to customers using mail protection solutions blocked by their mailboxes anti-spam/network filters?