If you have been given the subscription email address for the group, or you happen to know the group’s name, you can send an empty email message to the subscription address to join the group (or request membership, if the group is restricted). The format of the subscription email address is:

groupname+subscribe@groups.io

(Substitute the actual group name for groupname.)

! Important: After you send a message to a group’s subscription email address, you will receive a confirmation request message from Groups.io. You must respond to that confirmation request to complete your subscription and join the group.

Tip: For other email addresses you can use for actions related to your group membership, see Standard group email addresses.