Many people like to use different email addresses for different groups. Under Yahoo groups, We could join a group and then state the address we preferred to use for that specific group. I have search the options and there is no way to add a preferred address to that one group. The option definitely should be added to the subscription options for a specific group.
Ex:preferred email address you want to use for this group. NOTE: it is not changing the .io. account main email. Just the group preference address -- Thanks, Judy