PDF Report outlook missing attachment

Showing results for 
Show  only  | Search instead for 
Did you mean: 
Please sign in to see details of an important advisory in our Customer Advisories area.

PDF Report outlook missing attachment

L0 Member

Hi, my firewall is set to send PDF reports daily, attachments are usually not visible when receiving emails using Outlook.


I tested sending reports to Gmail, but I can't see attachments when I use Outlook to receive emails. But you can see in the web version of Gmail


Studying the source code of this email found that Outlook can display attachments normally as long as the = string is removed.


PAN-OS 10.1.6-h3

Please note you are posting a public message where community members and experts can provide assistance. Sharing private information such as serial numbers or company information is not recommended.

L6 Presenter

The "=" characters are the padding of the base64-encoded attachment. The base64 string should always be a multiple of 4 characters (excluding the carriage returns/line feeds added by the email format), if not it is padded with "=" to be a multiple of 4. If Outlook doesn't decode/display the attachment correctly I would suspect either the padding is wrong or the email attachment boundary markers are wrong, and Gmail is just better at working around slight errors. Determining exactly what is wrong would require a lot of in depth debugging.

  • 1 replies
Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!