554 transaction failed, possible abuse

I run an e.newsletter for the Syracuse University Alumni Club of South Florida. This morning my outbound messages are being blocked by Yahoo with a 554 message about possible abuse. My mailing list is 800 member. I send my messages in groups of 99. How can I explain to Yahoo that this is not abuse.

Thank you,


1 Reply
  • Dear Robert, has your problem been resolved?

    Regards, YW Low


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