Why do I receive a ‘too many syntax or protocol errors’ response when sending emails?
The ‘too many syntax or protocol errors’ response occurs within Outlook if you attempt to send an email to an improperly formatted address.
The error is as follows
Task ‘Mailer – Sending’ reported error (0x800CCC0F) : ‘The connection to the server has been lost. If this problem continues, contact your server administrator or ISP. The server responded: 501 Too many syntax or protocol errors’
How can I fix it?
When you are sending emails using Outlook, ensure that the recipient address doesn’t contain any special characters, such as quotation marks around the address. The server won’t know how to handle this and will generate the error.
This error often occurs when you copy & paste an address into the ‘To’ field without removing the quotations (e.g., ‘email@example.com’ instead of just firstname.lastname@example.org).
To fix the problem, remove the quotations or any other irregular symbols and resend your email.