Replies to Group invites expose primary address

Issue

When accepting a request to join a Google Group, replies to the invitation will always originate from your primary email address, even if the invitation has your secondary email (alias) as the recipient of the invite.

Cause

If a group invitation is sent to a secondary email address of an existing G Suite or consumer email account, accepting the invitation will expose the primary email address in the membership list of the Google Group.

Best practices

Understand that there is a risk of exposing the primary email addresses in this case.

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