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QuickBooks Online Sync Issue: Invalid Email Address Format

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Last updated on Aug 28, 2026

Why an email field with extra text fails to sync

Maxio sends the value in a Customer's QuickBooks email field to QuickBooks exactly as it's entered, whether that's the Customer record itself or, for QuickBooks Online, an Invoice's billing email address. QuickBooks only accepts a single, properly formatted email address in that field, so a value containing anything else, such as a person's name, gets rejected and the sync fails.

Remove the extra text from the email field

Remove anything from the Customer's QuickBooks email field that isn't part of the email address itself. Example: if the field contains John Smith <jsmith@test.com>, delete everything except jsmith@test.com.

The QuickBooks email field only accepts the email address itself, with no name or other text attached:

The QuickBooks email field on a Customer record in Maxio

For steps on managing Customer records, see Manage Customers for Contract Workflows.

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