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SMTP Error 523


The total size of your mailing exceeds the recipient server's limits

What does this mean?

The recipient's mail server does not accept email's with the used number of mass/multiple recipients. (Eg. Using 15 email address in the 'TO:' or 'CC:')

How to fix SMTP Error 523

For which ever email address failed, send the email to that user/address separately.

SMTP Error 523 Examples

  SMTP Error 450 5.2.3 Message Size greater than allowed by Remote Host
  SMTP Error 552 5.2.3 Data size exceeds maximum permitted
  SMTP Error 552 5.2.3 Message exceeds maximum fixed size

Similar SMTP Errors

email/troubleshooting/error-numbers/523.txt · Last modified: 2020/06/12 10:16 by Karson N.