I've checked the logs of my server and found a possible explanation.

On the very day I expirienced those errors my server had obviously a restart.

Since my server and the EU (german) ip of coinfoundry belong to the same hoster it might explain the trouble.

The hoster must have issues in his data center and/or network.

Not to be rude, but what does this "under review" tag mean? Is something happening anyway?

For me, everything is being normal again with the xmr.coinfoundry.org adress.

xmr.coinfoundry.org is now working for an hour.

There is a new - occasionally - error:

"no active pools - stop mining"

xmr.coinfoundry.org seems to be working again.

Have tried several vpn locations - all fine.

Didnt use ssl/tls though.

You are very right, this solved it for me too. Thanks!

You are very right. This solved it for me too.