The server responded: 501 Too many syntax or protocol errors’

Updated on 28 July 2023 2 min Read

Task ‘Mailer – Sending’ reported error (0x800CCC0F) : ‘The connection to the server was interrupted. If this problem continues, contact your server administrator or ISP. The server responded: 501 Too many syntax or protocol errors’

When sending emails using outlook you might receive the error above. It seems that when you copy & paste the email addresses into the To field, they include quotations around them that the server did not know how to handle (i.e. ‘name@website.com’ instead of just name@website.com). Remove the quotations & then try sending emails. They will work.

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The Author

Neha Kahnna is a professional content writer associated with MilesWeb. She curates articles on web hosting, latest SEO trends and technology topics. Her insightful content captivates the reader’s attention and deliver a higher learning ROI.