Emails are saying sent but are not being received at the other end.

Hi, @kmpdecor. When QuickBooks shows an email as “sent,” it means it successfully left our system. However, delivery can still be affected by a few things on the recipient’s side or along the way.

Email address accuracy, as even a small typo can stop delivery. It can occasionally end up in the spam or junk folder due to filtering. Some email providers may block or filter automated emails due to domain or server restrictions.

As a quick check, please review and update the email address. To do this, go to Customers/Suppliers > Edit > update the email > Save.

You can also ask them to check their spam or junk folders. Additionally, sending the same transaction to an alternative email address (e.g., Gmail or Outlook) to see if it goes through.

If emails still aren’t arriving, their email server may be filtering them. In that case, their IT support can allow list QuickBooks mail servers to help ensure delivery.

For more detailed steps, you can check this guide: 3 solutions for when customers aren't receiving your emails.

If you can share a bit more detail on what you’re seeing (for example, whether this occurs to specific customers or all of them), I’d be happy to help you narrow it down further.