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Proofpoint - Attachment gets rejected

taneli W/ Alumni Posts: 3 Security Scout



A customer is trying to send us an attachment (.zip) and its size is ~6MB and its only 1 file.

Why it is not coming through?


Status: Rejected
Final Rule: maxsize


Firewall rule:
maxsize : size greater than 25MB or Attachment count greater than 256 or Total Umcompressed Attachment size greater than 100MB or File count in archive greater than 256 or file depth in archive greater than 20


The file sit 1 (.zip) file with 1 file (.xlsb) and its only 6Mb


What should I look next?


  • taneli
    taneli W/ Alumni Posts: 3 Security Scout

    Thank you, this worked!

This discussion has been closed.