Best Time to Send Cold Emails: Days & Hours

What is the best time to send cold emails?

Most sources agree on the short answer: send between Tuesday and Thursday, in the working morning of the recipient's local time zone. Google's AI overview for this search, as shown at the time of writing, gives Tuesday to Thursday, 8:00 to 11:00 AM in the recipient's time zone. Other sources draw the window a bit wider or narrower, but they overlap. They all avoid weekends, Monday mornings and Friday afternoons. The reason is simple: that's when B2B inboxes are either filling up with backlog or being ignored.

Source	Recommended days	Recommended hours
Google AI overview for this search	Tuesday, Wednesday, Thursday	8:00–11:00 AM, recipient's local time
bookyourdata.com	Weekdays	9 AM–3 PM, and 5–7 PM as a second window
hunter.io (roundup of nine studies, quoting one sender's own result)	Tuesday and Thursday	11:00 AM or 2:00 PM ET

Read the table as a starting point, not a rule. The hunter.io figure is one sender's result in their own market. A US Eastern time slot means nothing to a prospect in Munich. And none of these windows changes what a receiving server does with a message from a domain that isn't authenticated.

Why the recipient's time zone decides the slot

The time that counts is when the email lands in the prospect's inbox, not when you click send. Say you're in Berlin and send at 10:00 to a list that mixes Germany, the UK and the US East Coast. The Germans get it at 10:00 and the Londoners at 09:00. The New Yorkers get it at 04:00, so by the time they log on it's sitting under a night's worth of newer mail.

• Store a location field for every prospect (a country is enough, a city is better) so you can sort the list by time zone before sending.
• Send each time zone group in its own local window instead of sending the whole list at once.
• Watch for daylight saving changes. Europe and the US switch on different dates, so for a few weeks a year the gap between them is one hour shorter.
• Keep in mind that the send time and the arrival time can be different. If a receiving server answers with a 4xx temporary failure (for example, greylisting or rate limiting), your server tries again later, and a 10:00 send can arrive after lunch.

There's a second reason to spread sends out. If a new domain sends a large batch all in the same minute, receiving filters see the same pattern as bulk mail. That's when deferrals kick in, so the burst ends up arriving late anyway. Spreading the same volume across a window of a few hours keeps the timing you planned and looks more like a person sending email.

Is 8am too early, and is 7pm a good time?

Is 8am too early to send an email?

No. 8 AM in the recipient's time zone is within the window Google's AI overview names (8:00 to 11:00 AM). It does come with a trade-off. An early email is near the top of the inbox when the prospect starts work, but they're also clearing the overnight backlog then. That's when quick deleting happens. 8 AM is fine for roles that start early, like operations and manufacturing. For people who spend their mornings in meetings, a later slot inside that window is usually the safer choice.

Is 7pm a good time to send an email?

Sometimes. bookyourdata.com names 5 to 7 PM as a second window, because some decision-makers clear their inbox after their meetings are over. The catch is that a 7 PM email sits in the inbox overnight, and whatever arrives the next morning pushes it down. Try evenings as a separate test cell for founders and small-company owners. Don't use it as your default for a corporate list.

What about Mondays, Fridays and weekends?

Monday mornings mean a backlog from the weekend. Friday afternoons mean people are closing out the week. Weekend sends reach an inbox nobody is working in. None of these is banned, and sending on them won't hurt your authentication. They just sit outside the window the sources in the table agree on, so test them deliberately rather than by accident.

How to test your own send time

The ranking pages agree on one thing above all: timing depends on context. The only way to find your own window is to test it. And test it on replies, because open data can't settle the question. Apple Mail Privacy Protection loads tracking pixels whether or not anyone reads the email. Our article on email open rate explains why cold senders can't rely on that metric, and which signals they can trust instead.

1. 1 Pick a single variable, such as a time slot (morning vs afternoon) or a day (Tuesday vs Thursday). Never test both in the same round.
2. 2 Split one segment at random, so each group has the same mix of roles, industries and company sizes.
3. 3 Send the same copy, subject line and video to both groups. If the message changes, you're testing the message, not the timing.
4. 4 Send each group in its local window, spread across that window as described above.
5. 5 Count replies, including negative ones, and bounces for each group. Ignore opens.
6. 6 Repeat before you decide anything. With a small list, the gap between two groups is often just noise. One week's result doesn't make a rule.

What doesn't work: switching to a new "winning" slot after a single send, or comparing a Tuesday batch to a list from a different industry on Thursday. Both mix up timing with something else.

When should you start cold emailing?

Start once the sending domain is ready, not on the day you register it. Before the first cold email goes out, your domain should have SPF and DKIM records published and a DMARC record at _dmarc. The setup is covered in DKIM, DMARC and SPF for cold email senders. Then build up volume gradually. A domain with no sending history that suddenly sends a full list gets judged on that pattern alone. Our guide to email warm up covers a week-by-week volume ramp.

Check the law before you check the clock. In Germany, the Act Against Unfair Competition (UWG) generally requires prior consent for email advertising, and the GDPR sets information duties when you collect personal data from somewhere other than the person it belongs to. No send time changes either requirement.

When to send the sales follow up email

Sales follow up email: when should it go out?

Send a sales follow-up email after a gap of several working days, not the next morning. Use the same rules as the first email: a weekday, in the recipient's local morning. Reply in the same thread. That means setting the standard In-Reply-To and References reply headers, so the follow-up appears under the original email instead of as a stranger's new message. Our article on cold email follow up covers threading and when to stop.

Follow up sales email: same slot or a different one?

Try a different one. If your first email went out on a Tuesday morning and got no reply, sending the follow-up on Thursday afternoon reaches the prospect at a different point in their week. Two emails in the same slot both run into the same meeting, if there's one that's always booked then. This is a small timing test you can run without changing the copy.

Sales follow up email template: which timing to build in

A sales follow-up email template should set the gap and the slot along with the wording. For example: the first follow-up a few working days after the first email, in a different slot, and in the same thread; a final follow-up later that offers a clear way to opt out. For copy-ready wording, see our sales follow up email template with examples for no-reply, post-call and breakup emails.

How EmailFlow OS fits into the timing decision

EmailFlow OS takes care of the personalised video part of cold outreach. You record one video, upload it, connect your own Brevo account and sending domain, and import your prospect list into EmailFlow OS. EmailFlow OS then makes a personalised version of that one recording for each recipient, not each company. Each version goes out from your own inbox, through your own Brevo account and your own sending domain. There's no shared platform sender in between.

For timing, that means every send builds history on a domain you control. If you send in bursts, it's your domain that shows the pattern. If you spread sends across the recipient's local morning, your domain builds that record instead. Because the prospect list lives in EmailFlow OS, the location data you need to group recipients by time zone sits next to the recording that gets personalised for each of them. The features page describes the sending setup in more detail.

Questions people ask

? Does the time of day affect deliverability?

Not directly. SPF, DKIM and DMARC checks give the same result at night as in the morning, because they look at DNS records and signatures, not the clock. What affects reputation is the volume pattern. A large burst from one domain in one minute can cause 4xx deferrals, while the same volume spread over hours looks like normal sending.

? Should I send cold emails on weekends?

Usually not as a default. The sources in this article (Google's AI overview, bookyourdata.com and hunter.io) all recommend weekdays, and weekend emails reach an inbox nobody is working in. They wait under Monday's backlog. Weekends can work as a separate test cell for founders who clear email on Saturdays. Measure that cell on replies, not opens.

? Is the best time different for video emails?

The timing rules are the same, because a video email is still an email. It arrives with a subject line, a thumbnail or link, and text, and goes through the same filters. One practical difference: watching a video needs a moment of attention. For that reason, a mid-morning slot after the early backlog has been cleared is worth testing against an 8 AM send.