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If you are a large group, or have differing roles and responsibilities, or specialized interests, you may find that  a subgroup will work well for your group.

A detailed page in this wiki in the Best Practices section - Why use a Subgroup - gives details about group addresses and more. This section is just an overview.

 

Creating a subgroup - the basics:

You can create a subgroup for your main group. For example:

1) Create avian group (this becomes the subdomain name once a subgroup has been created).

Now you have:

avian@groups.io - an ordinary group.

2) Within avian group, create birds subgroup.

Now you have:

avian@groups.io - The original group's original address continues to work (is aliased).

main@avian.groups.io - the original group.

birds@avian.groups.io - the subgroup.

(NOTE:  There is a delay for access after you create the first subgroup, due to the creation of the new subdomain, in this case avian.groups.io)

3) Go to the settings for main group and change its name (for example, to chickens).  (There may also be a delay in being able to access this name since it will need to be propagated through the DNS system.)

Now you have:

avian@groups.io - the original group (alias).

chickens@avian.groups.io - the original group.

birds@avian.groups.io - the subgroup.

 

Email and web addresses:

As you see, one name ("avian") is shared by all groups, while the parent group and subgroup also each have a distinguishing name ("chickens" or "birds").  

 

Membership

Members of subgroups must be members of the main group. 

Members of main groups are not necessarily members of a subgroup. 

 

Subgroup Messages and Archives

Since subgroup members are also members of the parent group, they can send messages as members to either group.

If someone of the main group who is not a member of the subgroup sends a message to the subgroup, that message would be treated as having been sent by a non-member (rejected or moderated, depending on your settings).

A subgroup's archives may be visible to the main group members, depending on the Privacy settings of the subgroup:

  • Listed in parent group, publicly viewable archives
  • Listed in parent group, archives viewable by parent group members
  • Listed in parent group, archives viewable by subgroup members only
  • Not listed in parent group, archives viewable by subgroup members only

 

Member List

If you choose to have members see the members list, the main group members will see subgroup members because subgroup members must be members of the main group.

 

Existing Group as a Subgroup?

It is easy to create a subgroup. However, if you wish to transform an existing Groups.io group into a subgroup, it may be possible, but you must contact support. 

If you wish to transform a Yahoo or Google group into a Groups.io subgroup, create the subgroup and treat it as the destination of the transfer process, proceeding as you would for any other transfer.