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When you send an Email, the When to send step offers four options:
OptionWhat it doesReach for it when
Send nowThe email goes out right away.The email is ready and timing doesn’t matter.
ScheduleSends automatically at a date and time you pick.You know the exact moment you want.
Intelligent sendDelivers inside time windows you set.You care more about when it lands than when it leaves.
Gradual sendRamps daily volume over several days.You’re warming up a new or low-volume domain.
Send now and Schedule work the way you’d expect. The two newer options have settings worth knowing about.

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Intelligent Send

Intelligent send delivers inside one or more time windows instead of at a single moment. Pick a preset (Morning commute, Mid-morning, Lunch break, Early afternoon, Post-work, Evening) or set your own window with the timeline and time fields, for example 09:00 to 11:00. Click Add window to deliver across more than one window; recipients are spread across all the windows you set. If a window has already passed today, those recipients get the email tomorrow instead. Windows follow the timezone in the Times in selector, so a 09:00 to 11:00 window in America/New York lands mid-morning for an East Coast audience no matter where you are when you hit send.

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Per-Recipient Intelligence

Intelligent send includes a Per-recipient intelligence toggle. Turn it on and Brew sends to each contact at their usual open time, based on their engagement history. Contacts without enough history use your windows, same as a regular intelligent send.

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Gradual Send

Gradual send ramps up daily volume instead of delivering to the whole audience at once. Use it to warm up a domain that is newly verified or has been sending at low volume. It works for your regular marketing and customer sends, so you don’t need a dedicated warmup campaign to build reputation. You control the ramp with four settings:
  • Start: begin right away or pick a date and time for the ramp to start.
  • Starting volume: how many emails go out on day one. Brew recommends 50.
  • Increment: how much the daily volume grows. The recommended 1.25x grows volume 25% each day.
  • Safety threshold: when Brew should pause the send. The recommended Balanced threshold pauses if bounces exceed 3% or complaints exceed 0.07%. You get an alert if sending pauses, so you can investigate before resuming.
As you adjust the settings, the Daily send schedule chart shows how many emails will go out each day.
Sending from a brand-new domain? Verify it first, then use gradual send for your first sends so the domain builds reputation cleanly.

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When You Launch an Automation

Launching a manual-audience automation run goes through a similar picker with three options: Run now, Schedule, and Gradual send. Intelligent send isn’t offered for automation runs; timing inside a flow comes from its Wait steps.
The Run automation dialog with Run now, Schedule, and Gradual send options

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