Hi Peter,
We are allowed to open images but we are not allowed to download any ANSYS generated files. So, from the post description, if we know that the attachment is an image many of us do go ahead and open them but if we can't tell if the file is an image we tend to avoid.
There is currently an Enhancement request to be able to view the extension of the attached file and hopefully, it will get implemented soon. Until then, please help us out whenever you can. The best way forward is to encourage users to use the in-line picture or preformatted text options, I will also post some general best-practices that we will use in our signature going forward that might limit this problem for you.
Regards,
Sandeep
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