[teekert]

Let's encrypt is great, but I'm still running into people that have Chrome on WinXP or even IE8. It's crazy, I know. They did promise to start supporting both o XP because it had something to do with an intermediate cert somewhere. They didn't deliver on that promise. I don't blame them.

By the way, the cert on Wordpress.com is issued by GoDaddy, all the examples I could come up with are also. Guess it's a roll out process.

[joshmoz]

Windows XP support was rolled out March 25 2016.

You can find more information about upcoming and completed features here:

https://letsencrypt.org/upcoming-features/

[rjbwork]

It also, ironically, broke a bunch IIS and Azure Web App hosted sites due to an incorrect intermediate being sent by the servers, with no recourse for new and renewing users at the moment...See https://github.com/sjkp/letsencrypt-siteextension/issues/42

[haroldp]

But that doesn't really help you if you are using SNI to host multiple sites on a single IP address, does it?

[pfg]

Internet Explorer doesn't support SNI on Windows XP, correct.

Let's Encrypt doesn't force you to use SNI, though. SNI is not something you "stick" on a certificate - it's a TLS extension which you don't have to use at all.

[ran290]

They did: https://community.letsencrypt.org/t/upcoming-intermediate-ch...