We've been using TestRail at Seagate for a couple of years now and like it very much. Unfortunately, this issue with the email report attachments is becoming a very severe issue for us. Echoing the feedback of so many users in this thread, we desperately need to have the automated email attachments be in PDF format or, at the very least, the basic HTML progress information embedded in the body of the automated email.
Like most other commenters here, our senior execs loath to open up attachments, extract files, then launch an index.htm file in a browser. They'd rather not even go to a website - If it's more than one click to access data, they'll skip it, and in turn blame ME for not providing the data in the format that they want or are accustomed to.
But now it's more than just preference/inconvenience - it's a security issue. Our IT group will no longer allow the ZIP file to remain attached to TestRail's automated email, and they won't Whitelist @testrail.com / @testrail.net to keep it from being stripped. Not strictly because of the ZIP attachment, but because in addition to the HTML files in the attached ZIP there are also two .js Java files and these files are considered executable. Because of the number of java scripts out in the wild that are malicious, there is a mandate from our IT and eSecurity group that absolutely none be delivered via Seagate's email system. As a result, they will not bypass this security measure for me or TestRail despite my pleas.
I am at an impasse. I need to send Daily Progress Reports for an average of 6 test projects to dozens of people every day, most of whom are senior execs without access to TestRail (nor do they desire it). The automated reporting capability of TestRail is currently useless to me, and doing this manually will take at least an hour of my time every morning, something I can ill afford. If I can't figure something out I may have to look into alternatives to TestRail.