Can we fix these Email delivery failures? "This IP has sent too many messages..."

We got a few of these email delivery failed messages today.     Our clients send out email messages thru our IIS 7.5 website.    We have SMTP running on the webserver.   This has been working great for a couple of years.    

One client today sent out a maybe 2 thousand email messages, higher then normal, all legitimate of course.        This was the FIRST time we saw these delivery failure.

And we always bcc an email address to ourselves such as Bill@[Company].com.  

Question:   Can we eliminate the delivery failure by raising our threshold of allows emails somewhere?    Do we do this at the "Reporting-MTA", which is our IIS box?    Or is this error coming from @[Company].com ?    GoDaddy hosts our email @[Company].com.


Reporting-MTA: dns;mail.[name of our website].com
Received-From-MTA: dns;[name of our IIS WEB server]
Arrival-Date: Thu, 5 Apr 2018 14:55:16 -0400

Final-Recipient: rfc822;Bill@[Company].com
Action: failed
Status: 5.1.0
Diagnostic-Code: smtp;550 5.1.0 <71.nn.nn.nn> This IP has sent too many messages this hour. IB504 <http://x.co/rlbounce>

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JReamAsked:
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Dave BaldwinFixer of ProblemsCommented:
That message comes from the mail server.  You need to contact Godaddy to see what the limits are for sending email.  The general limit is 250 per day.  https://www.godaddy.com/help/how-many-email-messages-can-i-send-per-day-313
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robocatCommented:
It depends on how things are configured.

If your SMTP MTA on the webserver is configured to send all e-mails by delivering them to GoDaddy as an intermediate, you will be restricted by any limits that GoDaddy has on their mail servers.

Alternatively the SMTP MTA on your webserver can be configured to deliver e-mails directly to the world, without use of an intermediate. This gives you full control over mail delivery without any limits.

So ask the person who configured the SMTP server.
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JReamAuthor Commented:
We think this issue is on the receiving side,  for GoDaddy mailbox account  :    Final-Recipient: rfc822;Bill@[Company].com
GoDaddy hosts the email for our @[Company].com accounts.

So maybe "Bill" simply received too many inbound email messages from a single IP source,  in our case:  Diagnostic-Code: smtp;550 5.1.0 <71.nn.nn.nn> This IP has sent too many messages this hour.

This would make sense, and we can live with this, since "Bill" was just a bcc anyway.
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JReamAuthor Commented:
We had a long chat with GoDaddy tech support today.  Took them a while just to understand the question.   In the end they said that they "can't" raise the limit above 1000 (email messages inbound from a single MTA and/or IP address, which happens to be our single MTA source) nor can they whitelist the MTA dns/ip.  The good news is that this error has no impact on our customers.
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Dave BaldwinFixer of ProblemsCommented:
Looks like dropping the 'Bcc' should 'fix' the problem.  You should be able to locate the messages in a 'Sent' folder.  I only send a 'Bcc' when it will tell me something else about the email.
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