Warning: fopen(/domains/smtp-error-codes.info/public_html/bezoekers.log): failed to open stream: Permission denied in /domains/smtp-error-codes.info/public_html/includes/log_bezoeker.inc on line 15 Warning: fwrite() expects parameter 1 to be resource, boolean given in /domains/smtp-error-codes.info/public_html/includes/log_bezoeker.inc on line 16 Warning: fclose() expects parameter 1 to be resource, boolean given in /domains/smtp-error-codes.info/public_html/includes/log_bezoeker.inc on line 17 Yahoo bounce message: 451 Resources temporarily not available - [#4.16.5]
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Yahoo bounce message: Resources temporarily not available - [#4.16.5]

This error indicates that our servers were busy and temporarily unable to process your transaction at the time of connection. Such issues are generally brief, and normal connectivity is usually restored after a short period of time.

Stop all this jibber jabber, what does it mean?

The Yahoo server who is responsible for Yahoo email accounts was too busy to send your email to their users. Your email was not delivered.

Did I do something wrong?

No.

How can I fix this?

At this point there is nothing you can do, other than wait for the Yahoo server to be less busy. Try to send your email again in a few minutes or hours.