SAP Knowledge Base Article - Public

3480838 - After sending e-mail with PDF file to C4C, you cannot open the file.


You are sending emails to C4C, and the PDF attachment cannot be opened after downloading it from C4C


SAP Cloud for Customer

Reproducing the Issue

  1. Send an email with PDF attachment
  2. Open the email in C4C
  3. Download the file
  4. Try to open it in any PDF reader
  5. You got an error saying the file cannot be opened


The PDF was sent with "x-uuencode" encoding method which is not supported by C4C as it uses the MIME standards for its email content handling (as described on RFC 2045)

"x-uuencode" is a method used to encode binary files, such as PDFs, into plain text format for safe transmission across different systems, particularly in the early days of the internet and email.


The PDF attachment will need to be sent using "Base64" Content-Transfer-Encoding, which is supported by C4C.


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