[fix][webmail] invalid link is generated if first group is disabled. (#2368)
[fix][webmail] invalid link is generated if first group is disabled. (#2368)


MasakiInaya/shirasagi,shirasagi/shirasagi,tany/ss,itowtips/shirasagi,ShinjiTanimoto/shirasagi,MasakiInaya/shirasagi,tany/ss,ShinjiTanimoto/shirasagi,shirasagi/shirasagi,itowtips/shirasagi,sunny4381/shirasagi,mizoki/shirasagi,sunny4381/shirasagi,sunny4381/shirasagi,shirasagi/shirasagi,sunny4381/shirasagi,MasakiInaya/shirasagi,itowtips/shirasagi,mizoki/shirasagi,shirasagi/shirasagi,ShinjiTanimoto/shirasagi,mizoki/shirasagi,MasakiInaya/shirasagi,tany/ss,tany/ss,mizoki/shirasagi,ShinjiTanimoto/shirasagi,itowtips/shirasagi