Why are invoices queueing

How do I get immediate send on invoice rather than queue?

I push send on an invoice.
It says it sent
Dashboard status is SENT
But brief message in black at bottom says it queued.
Invoice is not received at intended email.

Also, how do I see status of whether a client viewed invoice? That was helpful in v4.



Although invoices are queued they should be sent pretty quickly, you may want to set yourself as the BCC on Settings > Email Settings to check if the emails are being sent.

The invoice status will change to ‘Viewed’ once it’s been viewed, you can see the details on the contacts tab of the invoice sidebar.

What is “contacts tab of the invoice sidebar”
I see Clients. Is that it? That doesn’t show invoice status.