[fix] webmail : unable to set $MDNSent flag (#2385)
[fix] webmail : unable to set $MDNSent flag (#2385)


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