Email sent to "me" is being bounced.

gadgeteer Posts: 2 Spectator
edited March 13 in Email

I'm asking for another one of your customers on this.

They are subscribed to a daily email newsletter sent out by the St. Louis Post-Dispatch ( The PD's staff can see the email is bouncing with the error message:

5.1.0 <> sender rejected. Please see for more information. AUP#In-1310

But they can't identify the issue since the web page no longer appears to exist.

That error message is coming from the spectrum email servers... What does it mean?

Best Answer

  • William_M
    William_M Posts: 1,159 ✅ Verified Employee Moderator
    Answer ✓

    Hey @gadgeteer, welcome to our community!

    1300 errors read "Spectrum limits the number of concurrent connections from a sender, as well as the total number of connections allowed. Limits vary based on the reputation of the IP address. Reduce your number of connections and try again later." It is a problem with the senders IP typically caused by excessive mail volume, concurrent connections, recipients marking the emails as spam, etc.


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