It seems not supported: http://mxtoolbox.com opens up fine.
https://mxtoolbox.com redirects to http://https://mxtoolbox.com
See: https://www.eff.org/https-everywhere/atlas/domains/mxtoolbox.com.html
Only content security header seems properly configured.
Definitely something wrong, three warnings and errors: https://asafaweb.com/Scan?Url=mxtoolbox.com
HTTP Server: IIS 7.5
Operating System: Windows Server 2008 R2
ASP.NET Version: 4.0.30319
Sites that know I have visited the site are in my case:
aspnetcdn.com
cloudfront.net
customer.io
google-analytics.com
google.com
googleadservices.com
googlesyndication.com
jsdelivr.net
mustbebuilt.co.uk
visualwebsiteoptimizer.com
Possible Frontend SPOF from:
ajax.aspnetcdn.com - Whitelist
(99%) -
pagead2.googlesyndication.com - Whitelist
(47%) -
www.googleadservices.com - Whitelist
(5%) -
www.google.com - Whitelist
(3%) -
cdn.jsdelivr.net - Whitelist
(1%) -
AV has been triggered, see here: https://www.robtex.com/en/advisory/dns/com/mxtoolbox/
Trojans detected see via: https://www.virustotal.com/nl/domain/mxtoolbox.com/information/
Backdoor.W32.Poison?
polonus