501 Too many syntax or protocol errors - Outlook / Outlook Express

Issue Error Messages:
SMTP call from (workstation) [] 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. ‘name@website.com’ instead of just name@website.com).

Remove the quotations & then try sending emails.

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  • Jamie Bishop  
    The address book seems to add the quotation marks from ACT when I try to set up a group email... how do I stop it doing that pls?
  • sanjay bhatt  
    thanks .. it works
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