Reply later
Keep the conversations you mean to answer in one place, until you reply.
Reply later is your own list of conversations to answer. Put a conversation there while you read it, and it waits for you until you reply.
Put a conversation in Reply later
Open the conversation
Select it in your inbox or any other folder.
Select Reply later
Select Reply later in the toolbar above the conversation. You can also open the ⋯ menu next to a conversation in the list, or right-click it, and select Reply later.
Conversations in Trash, Spam, Sent and Drafts can't go in Reply later.
Find them again
Select Reply later in the sidebar, below Inbox. The number next to it is how many conversations are waiting. In All inboxes, the list covers every mailbox.
A conversation stays in Reply later when you archive it or move it to a folder or label. The list shows which folder each one is in.
Take a conversation out
A conversation leaves Reply later on its own once you reply to it, from Mira or from another email app. Replies from another app count once Mira syncs them.
To take one out yourself, select Remove from Reply later in the toolbar or in the conversation's menu.