Hi Adrian_A,

Thanks for the reply!  Unfortunately the email is being caught at the recipient's server level before it can make it to their mailbox.  Their admin does have the ability to whitelist the sender's address but I am trying to avoid contacting all my customers who check for a valid SPF record to do so.

Your replay said that the email should be sent from e.notification.intuit.com which is not the address I show  sending my invoices and may be the issue.  The e.notification.intuit.com does have an SPF record whereas just notification.intuit.com that my QuickBooks Online account uses does not.  I have been using QuickBooks Online for almost 15 years so maybe my account is setup differently than most.

Would you please look into this difference of e.notification.intuit.com vs notification.intuit.com to see if this problem can be solved on your end?  Maybe an SPF record could be added to notification.intuit.com or my account can be set to send email using e.notification.intuit.com instead to solve this problem.

Thanks!