My site has previously sent out emails to customers without issue, but I noticed a week or so ago that they were not working. I am on v1.5.4. When I update an order instead of emailing the customer I get this error at the top of my browser:
To my knowledge no changes have been made to my site, server or ZenCart files regarding email sending.ERROR: Failed sending email to: "Paul Bianchi" with subject: "Order Update #134" SMTP Error: The following recipients failed: scott@uni_xxx__olar.comSMTP server error: Authentication failed
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