My clients with Hotmail email addresses are not receiving invoices sent through Quickbooks. Why not?

Nice to see you here in the Community, @bayviewplumbers. 

Here are the possible reasons your clients aren't receiving invoices sent through the program: 

• The emails might have been marked as spam. 
• Many email providers, such as Hotmail, use various blocking mechanisms on their mail servers. Your clients' emails were blocked by their email provider. 

First, you can ask your clients to check their Spam or Junk Mail folders. This way, they can check if the invoices were moved there. Also, emailing sales forms

from the program are sent through quickBooks@notification.intuit.com. Please have them clear and then re-enter this email address so they can find their invoices. 

Second, you can use your clients' different email addresses that have different domains. This helps you verify if their email provider, Hotmail, is blocking your invoices. 

You can check out this article: 3 Solutions For When Customers Aren't Receiving Your Emails. It lets you see the list of Host Names and IP addresses and the steps for when your clients aren't receiving emails. 

I'll be right here to help if you have other concerns. Have a great day, @bayviewplumbers.