Outbound Email problem

I am starting to receive the message 452 4.7.0 too many messages sent. I am only sending one message.  How can I fix this?

Having same problem. Emails sent from ISP's webmail send normally (from same account). Norton and / or Outlook 2010 are causing this problem - Not my ISP, nor the number of emails sent.  

I am starting to receive the message 452 4.7.0 too many messages sent. I am only sending one message.  How can I fix this?

Hi jharvallen,

 

Have you contacted the ISP for confirmation?  Any SMTP error concerning the number of messages being sent would be due to a server rejecting the messages - something that most ISPs do to limit spam.  Norton really doesn't care about the number of messages you are sending.  Sometimes, though, if you are using a secure port required by your ISP, rather than Port 25, Norton's outgoing mail scan might cause problems in sending, but that would be a different issue.  In that case, you should disable Norton outgoing mail scans.