Can't subscribe to gradle-dev mailing list

When I send an email to, I eventually get a response (this one took several days):

Hi. This is the qmail-send program at I’m afraid I wasn’t able to deliver your message to the following addresses. This is a permanent error; I’ve given up. Sorry it didn’t work out. /usr/bin/env: ruby: No such file or directory I’m not going to try again; this message has been in the queue too long.

Thanks for the report. I’m taking this up with our service provider.

For reference: