Hello,
I'm using the email:notify pipe to send a monthly report. It works but for some reason the attachment (csv file) is recognized as broken by Thunderbird email client. If I install the "show all body parts" plugin in Thunderbird I can see and open the csv file. This addon is only required if there is a structural problem with attachments.
I know this is kind of a specific problem, but maybe you can fix it.
Here are screenshots of the email source and the pipe:


Thank you and have a nice day!