Hi, Currently I'm developing a background script that at the end of script it will produce a report then send it to my email. The email contain a html file (the report comes in HTML file because it quite big, over 1.5Mb) However if I access the email from thunderbird and try to open the attachment. Thunderbird gives an alert says This attachment appears to be empty. Please check with the person who sent this. Often company firewalls or antivirus programs will destroy attachments. I can't open the attachment nor download it. But if I access the email through browser (gmail), I can download and open the attachment. Do you have any idea to solve this? I use Thunderbird 45.5.1 and Firefox 50.0.2 Thanks