Issue Error Messages:
SMTP call from (workstation) [127.0.82.61] dropped: too many syntax or protocol errors (last command was "RCPT TO:
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. ‘email@example.com’ instead of just firstname.lastname@example.org).
Remove the quotations & then try sending emails.