550 Rate Limit Error

  • Thread starter Thread starter SGriffin.Esp
  • Start date Start date
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SGriffin.Esp

Our business keeps getting the following error when sending batch emails to our staff;


SMTP1 #550 RATE LIMIT: Too many messages sent in the last 1h


Certain messages still go through and I can't find a trend. Our ISP (TalkTalk) has said it is not an issue at their end but a Microsoft SMTP issue.

We use a catchall (POP3 email) and distribute to our network via Microsoft Exchange Server 2010 which is running on Microsoft Small Business Server 2011.


I have check this morning and neither our IP or company domain are blacklisted.


Any help/advice would be much appreciated.


Thanks

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