When I email invoices from QBs, I receive notifications back that the emails are undeliverable, but the emails are going through and being received. Does anyone know why?
Thanks for coming to the Community with your question. You've come to the right place! I'd be happy to help you with this.
If some outgoing emails are displaying an "Undelivered" status, there's a few possibilities that could explain why. The first thing to do is confirm each of the addresses is accurate. If some are going through, that means the correct email is being used for the ones that were sent successfully. There are other factors as well. For example, if an invoice was sent to three recipients and only one of them didn't send, QuickBooks won't specify which of them was not deliverable. It will just provide the "Undeliverable" status for that batch of emails.
If you've ruled out both of those possibilities, there could be a temporary issue with the recipient's email server. If that's the case, then the owners of the email addresses you're trying to send to would want to check and possibly troubleshoot with their providers.
If there's anything I can help with, please do let me know.