Some people are not receiving my invites and therefore cannot respond to my invite and join the group.?

Question

Some people are not receiving my invites and therefore cannot respond to my invite and join the group.?

Answer 1

some mail providers like hotmail sees invites as spam, and never deliever them to the person. if your group is closed/ invite only, you're in a bind, ask for another e-mail address

if it's not a closed group, consider sending the direct link/ url of the group and they can join per the Join tab on the group