Ever since Gmail came out, the action of archiving e-mails (instead of deleting them) has become my most common action on a message after I've read or responded to it.
In the latest and previous versions of the Zoho Mail mobile app (I use iOS), the Archive option is not easily accessible from a message. Instead, you get the option to Delete, Move, Flag, Label, (now under the More menu) Mark as Spam, Make Offline, Print, and Mark as Unread.
Why not let us Archive directly from the message? I archive way more often than I delete e-mails.
I hope you might consider checking how often users actually use Flag and Label from the mobile app. I feel like those might be less used than an Archive button, which means you could move them to the More menu and bring the Archive function to the main screen for messages (see attached image).
Without an Archive button, I have to use the Move icon and then find my Archive folder. Three taps and two screens instead of one tap action.