Your mail servers might have this type of 'spoofing' blocked. When you send a sales form/statement to your customer, the emailed sales form/statement looks as though it's coming from your mail server when, in fact, it's being sent from a QuickBooks Online mail server. This is an anti-spam measure to prevent spammers from pretending to deliver mail from well-known domains. Also, many email servers don't accept mail from server IP addresses without reverse DNS entries that match the domain name that the server alleges to be representing. Many email programs use various blocking mechanisms on their mail servers. If those solutions don't work, you may need to ask an IT expert to have the QuickBooks Online mail server host names and IP addresses be added to your outgoing mail servers. Solution 3: Configure server to accept QuickBooks Online mail server host names and IP addresses If you still don't receive the email, try using a different email address that has a different domain (for instance, if you were using a Gmail email address, try a Hotmail or Yahoo address instead).( Note: Be sure not to use any extra characters or spaces before, within, or after the address you enter). Clear the Company email field and enter the desired address as is, even if it appears correct.Under Your Company, select Account and settings.If the email is still not found, clear and then re-enter your email address. If solution 1 doesn't apply, ask your customers to check their junk mail and spam folders.

Solution 2: Clear and re-enter your email address Review each email address and make changes as needed.Select Company, then select the edit icon in the Contact info section.Under Your Company, select Account and settings.If you recently imported QuickBooks Desktop data into a QuickBooks Online company, you may need to reset your email address: Are your customers not receiving your invoices, sales receipts, estimates, statements, or reports via email? Here are three possible reasons why, and how you can fix the problem.

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