The mailto links in the subscribe and unsubscribe confirmation emails are gone.
The group name is now given in plaintext, instead of as a link that attempts to submit a post.
Now the member has only one choice -- read the content of the email and reply as instructed. :)
Thanks, @Mark Fletcher!
Thank you for your interest in Groups.io and the group <groupname>.groups.io. To complete your subscription, please reply to this email.
If you did not request - or do not want - a subscription to this group, please accept our apologies and ignore this message.
The Groups.io Team