Hope everyone can help me. Recently I have received a lot of messages from customers, but I cannot reply to them. I do not know why? I tried clearing cache, using new browser.. but still can't send message. Below is a picture of the problem, can anyone give me some advice?
I've found a past case where user experienced "Message not delivered" error. The cause of this case was this user didn't grant HubSpot one of the permissions the HubSpot App needs when they connected the Facebook Messenger.
And the solution for this case was:
Delete the HubSpot FB app entirely in your Facebook settings here
Then delete the FB pages + reconnect them within HubSpot as well
If you're not attempting to send emails to unexisting contacts, the above could be the case.
I see that you attempted to send emails to those "Unknown Visitor" and it failed. When a contact appears as "Unknown Visitor", it usually means this person's contact record no longer exists in your HubSpot account. Could you please verify this?
And if there are actually their contact records, could you please share the URL so that I can have a closer look?