Same issue on my end. Same clients the past 6 years, no changes on our end or theirs and suddenly can't send invoices, bounced emails and errors. Oddly, today I tried to send off 4 invoices to long time customers, 2 went through fine and 2 didn't which means I have to download them as pdfs and email them directly, which worked fine. Strange that I can send them via any email client and never get errors except through you guys. I talked to support yesterday and they suggested a different browser in incognito mode, seems like window dressing. All the emails address I have built into my QuickBooks customer base work fine in any email client, they just won't send via QuickBooks. A fix to this soon would be excellent, it's extremely frustrating
