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Schedule a Monday morning email on Friday night, or give yourself 30 seconds to catch a mistake after hitting Send. Slashy supports both scheduled delivery and a configurable undo window.
Schedule send picker with preset options

Scheduling an Email

Press Cmd+Shift+Enter after composing to open the schedule picker.
PresetWhen It Sends
Later todayA few hours from now
Tomorrow morningNext business day at 8am
Tomorrow afternoonNext business day at 1pm
Next weekFollowing Monday at 8am
CustomAny date and time you choose

Managing Scheduled Emails

Navigate to the Scheduled view (g l) to see all pending emails. For each one:
  • Cancel — reverts to a draft
  • Reschedule — pick a new send time
  • Send now — skip the schedule and send immediately
Scheduled view with pending emails and action buttons
You can schedule emails through the AI agent: “Draft a follow-up to Sarah and schedule it for Monday at 9am.”

Undo Send

Every email has an undo window. After pressing Cmd+Enter to send, a toast appears with an Undo button and countdown. Click Undo or press z to cancel before it expires.
Undo send toast with countdown timer
During the undo window, the email has not been delivered. If you undo, it reverts to a draft and the recipient never sees it. This is a true cancel, not a recall.

Configuring the Undo Delay

1

Open Settings

Go to Settings > Account (Cmd+,).
2

Find Undo Send Delay

Set your preferred delay between 5 and 300 seconds.
DelayGood For
5 secondsFast delivery, rarely undo
10-15 secondsQuick safety net for typos and wrong recipients
30 secondsStandard — enough time to re-read
60-300 secondsMaximum safety for high-stakes emails

Undo Send vs. Scheduled Send

Undo SendScheduled Send
PurposeCatch mistakes after sendingDeliver at a future time
Delay5-300 secondsMinutes to days
TriggerAutomatic on every sendExplicit (Cmd+Shift+Enter)
Cancelz or click UndoFrom Scheduled view
Both work together. A scheduled email triggers undo send after its scheduled time arrives.

Replying & Forwarding

Reply, reply all, and forward with proper threading.

Inbox Views

Navigate all inbox views and filters.