In Yahoo mail, outlook mail.. saving email to Darft folder is worked. But, I can't save email to Draft folder in only GMAIL. The error description is: "The requested folder does not exist. Folder selection failed". See my code below:

MCOIMAPAppendMessageOperation * op = [self.currentAccount.imapSession appendMessageOperationWithFolder:self.currentAccount.draftFolder messageData:data flags:MCOMessageFlagDraft];
[op start:^(NSError *error, uint32_t createdUID) {

}];

I logged the value of draftFolder in this case is "[Gmail]/Drafts".

Please help me!