BlueMail lets you act on an email directly from its notification, without opening the app.
To customize which actions appear, go to Settings | Global Settings | Customize Menus | Configure Notification Actions. Tap the ( + ) icon to add an action, use the drag handle to reorder, and tap X to remove one.
You can pick up to three actions. Once three are selected, adding another is refused until you remove one. Out of the box the three are Reply, Read/Unread and Delete.
The full set to choose from: Read/Unread, Archive, Delete, Star/Unstar, Reply All, Reply, Forward, Done/Undone, Block Sender (Mark Spam), Mark All Read and Reply Later.
