---
title: "Outreach Send Windows: Why Timing Gets Accounts Flagged"
url: https://trysumora.com/guides/outreach-send-windows
markdown-of: https://trysumora.com/guides/outreach-send-windows
---

# Outreach Send Windows: Why Timing Gets Accounts Flagged

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# Send windows and timing in outbound

Timing is an enforcement signal independent of volume. The send window that looks human, why exact intervals get accounts flagged, and how timezone mismatches quietly break multi-seat outbound.

By Devansh Ranjan · Published Aug 7, 2026

**Short answer:** send between **08:00 and 20:00 local** to the sending account, **Monday to Friday**, with **irregular gaps** between actions. Timing regularity is an enforcement signal on its own — independent of how conservative your volume is.

Almost every discussion of outreach safety is about volume. Timing gets far less attention and is nearly as important, because it is cheaper for a platform to detect. Counting sends requires thresholds and tuning. Spotting an account that acts at 3am, or at exactly even intervals, requires almost nothing.

## The three timing signals

Signal

What it looks like

Fix

Out-of-hours activity

Sends at 3am, or evenly across 24h

Hard window, 08:00–20:00 local

Interval regularity

One action every 180 seconds, exactly

Irregular gaps between actions

Seven-day activity

Identical weekend and weekday volume

Weekdays only by default

## Local means local to the seat

This is the failure that catches distributed teams. If seats sit in London, New York, and Singapore but the schedule runs on one central clock, two of the three are sending outside human hours for their own profile — from an IP in that region, on an account whose audience is in that region. That mismatch is more conspicuous than the volume ever was.

Each seat’s window has to be anchored to that seat’s own timezone. [Sumora](/) enforces 08:00–20:00 owner-local, Monday to Friday, per seat — see the [capability table](/capabilities).

## The compounding effect

Timing and volume are not independent risks — they multiply. An account at a conservative 20 invites a day, sent in a clean weekday window with irregular gaps, is in a completely different risk class from one sending the same 20 spread evenly across 24 hours, seven days a week. Same volume, very different profile.

This is also why [approval queues help safety](/guides/ai-outbound-approval-architecture) and not just quality: a human clearing a queue naturally produces irregular, working-hours activity. Fully autonomous sending has to simulate what approval gives you for free.

## Frequently asked questions

What time should you send cold outreach?

Within normal working hours for the sending account's timezone, roughly 08:00 to 20:00, Monday to Friday. The exact hour matters far less than simply not sending outside human hours.

Does sending at night get your account flagged?

It contributes. Round-the-clock activity is one of the clearest automation signals available to a platform, because real people sleep. An account with modest volume spread evenly across 24 hours looks more automated than one with higher volume concentrated in working hours.

Should there be random delays between outreach actions?

Yes. Actions at precise fixed intervals — one exactly every three minutes — are trivially detectable. Irregular gaps that vary meaningfully between actions are far closer to how a human works through a list.

Does the send window matter across timezones?

Yes, and it is a common failure. Each seat's window must follow that seat owner's local timezone. A team running seats across regions from one central schedule will have some accounts sending at 3am local, which is exactly the pattern enforcement looks for.

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