[FreeToastHost] Message Not Delivered: Valley Shore Toastmasters Club 9/15/2025

Our Valley Shore Toastmasters Club members are receiving this email message after signing up on FreeToastHost for roles. This started about 2 months ago. Prior to this, no issues. Please advise on how to resolve. Seems to be occurring regardless of what email server each member has. Email response should be the notification of role change.
Website:  valleyshore.toastmastersclubs.org/

Here is the email response:

• FreeToastHost Server 
  www.toastmastersclubs.org
  From:server@toastmastersclubs.org
  To:arthur_allen0052@sbcglobal.net
  
  
  Sun, Aug 24 at 12:03 PM
  
  Your email message to This email address is being protected from spambots. You need JavaScript enabled to view it. could not be delivered
  
  and was returned to the FreeToastHost server. Details are as follows:
  
  
      Recipient Email Address: This email address is being protected from spambots. You need JavaScript enabled to view it.
  
      Email Subject: Valley Shore Toastmasters Club 9/15/2025 Meeting Notification: Role
  
      Date Sent: Sun, 24 Aug 2025 16:03:04 +0000
  
  
      Diagnostic Code: 554 5.7.9 Message not accepted for policy reasons. See  senders.yahooinc.com/error-codes
  
      Delivery Status: 5.0.0
  
      Date Last Attempted: Sun, 24 Aug 2025 16:03:19 GMT
  
  
  NOTE: This email address may be invalid or non-working and should be changed, deleted, or updated to allow delivery.
  
      Refer to the following user documentation for other ways that your recipient may be able to use to remedy this problem:
  
           support.toastmastersclubs.org/doc/item/e...embers-receive-email
  
  
  If you have any questions about this, please visit us at support.toastmastersclubs.org .
  • email_175605141102785.txt
    3.5 kB

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Please let us know if you are still getting these errors, changes have been made.

Thank you very much, seems to be resolved. Appreciate your quick response!