A bump email is a short reply on the same thread that brings an unanswered email back to the top of someone's inbox. You hit reply on your own sent message, write two to four sentences, and send. Your earlier note stays underneath, so the reader gets the context without opening anything new.
A good bump has four parts: one line that points back at your earlier note, one new thing, one question that takes seconds to answer and, when it fits, a polite way out. It never says "just bumping this" and stops there.
Every bump also comes with a decision about the next move. Silence earns another bump or a switch to LinkedIn. A "not now" earns a date in your CRM. A clear no or an opt-out means you stop the same day.
When is a bump email worth sending?
A bump works when your first email was fine and the silence is about timing. The person read it on a phone between two meetings, meant to answer, and the thread sank under a screen of newer messages. Nothing in your email needs fixing. It just needs to come back up.
The numbers back this. lemlist's analysis of its own campaigns puts a single email at a 4.5% average reply rate. Sequences of up to 10 emails reach 22.37% in total. On those figures, the follow-ups add far more than the first email did.
A new email works better when the first one was the problem. Reread it the way your prospect did: ten seconds, no context, a full inbox. Use this table to decide.
| What you see when you reread the first email | Next move |
|---|---|
| A short, clear ask to the person who owns the problem | Bump on the same thread |
| The ask is buried in paragraph three, or missing | Write a new email with one clear question |
| Most of it is about your company | Rewrite it around their situation, then send that |
| You wrote to someone who does not own the problem | Send a redirect bump asking for the right name |
I never treat a single email as the plan, because one make-or-break message is a lottery ticket on what someone's calendar looks like that morning. The order in my campaigns does not change: first a conversation, then a call out of that conversation, then a client out of the call. A bump keeps that first conversation possible.
How many follow-ups to send in total is a separate question. Whatever the count, each one still has to be a good bump.
How do you write a bump email in two to four sentences?
Use the same four parts every time. The table shows what each part does and when you can drop it.
| Part | Its job | Example line | Drop it when |
|---|---|---|---|
| Context line | Tells them which conversation this is | "Picking up my note from Tuesday about the Ohio plant." | Never; it anchors the email |
| One new thing | Gives a reason to look again | "Your second depot opens in May." | Only on an internal reminder with a hard deadline |
| One easy question | Makes answering take seconds | "Is that on your desk this quarter?" | Never |
| Exit line | Lets them say no without guilt | "If the timing is wrong, tell me and I will stop." | On a first bump to a warm contact, where it reads as giving up early |
The question carries the whole email, so make it cheap to answer. Four shapes work: a yes or no, a name, a date, or a choice between two options. "What do you think?" asks for an essay. "Thursday or Friday?" asks for one word.
Ask for the next small step, never the deal: a short call, a name or permission to send one page. Pitching early is the quickest way to get ignored, and a bump is no different. After one unanswered email, a stranger has given you almost no trust. So ask for almost nothing.
Keep the bump between about 25 and 60 words, and always shorter than the email it sits on. If you need more room, you are writing a new email, so write one. The broader evidence is covered in what the length studies say.
Get the tone right before you polish words. I write bumps the way I would message a client I already know: a first name, plain words, no phrases that smell like a sequence tool.
Read yours out loud. If it sounds like a form letter, it will be treated like one. Then test two versions on a small slice of the list before you send either to everyone: the more you test, the faster a winner shows up.
Six bump email templates you can adapt
Every template below is constructed for this article. The names, companies and details are invented, so swap in your own. The word counts include the greeting and leave out the sign-off.
1. Cold first touch, after a LinkedIn connection
Hi Priya, picking this back up after we connected on LinkedIn last week. Something I left out: your new Ohio plant means a second list of suppliers to vet. Is that on your desk this quarter?
36 words. It fits when your first email followed a LinkedIn connection and got nothing back. The email does not pretend to be the first contact. On most B2B lists I want a LinkedIn touch before any email, so the name in the inbox already belongs to someone they have seen.
2. Second bump with a new detail
Hi James, one more thing on fleet maintenance. Two of your three depots sit outside our current service radius, so I checked whether we can cover both. Want me to send the depot-by-depot plan?
34 words. It fits a cold prospect after one quiet bump. The new fact answers an objection they have not raised yet. Nothing in it restates the first email.
3. After a discovery call
Hi Tom, thanks again for Thursday's call. You mentioned the board meets on the 14th, so I put the two pricing options on one page, attached. Which one should I walk your finance lead through before then?
37 words. It fits when the call went well and the agreed next step stalled. The board date gives a real reason to answer now, without inventing urgency.
4. After a proposal
Hi Elena, a quick add to the proposal from the 3rd. I split the rollout into two phases, so only the first phase hits this year's budget. Does that make it easier to approve, or is the blocker somewhere else?
40 words. It fits a proposal that went quiet, which often means it has been passed to someone you have not spoken to. There is no "any update?" in it, and the reader gets something they can forward.
5. Wrong person, asking for a referral
Hi Lucy, I may have the wrong person for scaffolding hire. If site equipment sits with your operations team, who is the best person to send this to? A name is plenty, and I will keep you out of the thread.
41 words. It fits when the title looked right but the silence suggests otherwise. It costs the reader one name, and the promise to leave them out of the next thread makes giving it easy.
6. The soft exit
Hi Owen, I have written a few times about the safety training slots, so I will stop here. If it comes back on the table after the spring tender, reply with "later" and I will check in then. Either way, good luck with the bid.
45 words. It fits as the last email in a sequence. It ends the sequence on your terms and gives them a one-word way back.
What to write instead of "just bumping this to the top of your inbox"
That line tells the reader only one thing: they are behind on email. Here are three better versions of the usual weak lines, and why each one works.
Rewrite 1: from "just bumping this" to one new detail
Before: "Hi Sam, just bumping this to the top of your inbox. Let me know your thoughts!"
After: "Hi Sam, one detail worth adding: your Leeds depot opens in May, which can mean a fresh round of supplier vetting. Will that land on your desk before May?"
What changed: the empty announcement is gone, and in its place is a date they care about and a question they can answer in one word.
Rewrite 2: from "did you see my last email?" to a direct question
Before: "Hi Sam, did you see my last email?"
After: "Hi Sam, quick one: is supplier vetting with you, or should I ask your procurement lead?"
What changed: the old line asks them to admit they ignored you. The new one offers two answers, and both move you forward.
Rewrite 3: from "I never heard back" to a short exit
Before: "Hi Sam, there has been no reply so far, so is this not a priority?"
After: "Hi Sam, I will leave it here. If May turns out to be the right moment, reply 'May' and I will pick it up then."
What changed: the complaint is gone, and the new version names a future moment and asks for a one-word reply.
The same logic applies to other stock phrases. Each of these makes the reader feel guilty or pushed, so swap it out:
- "As per my last email" reads as a reprimand. Restate the one fact that matters instead.
- "Just checking in" says you have nothing new. Add one detail or do not send.
- "Sorry to bother you again" asks them to reassure you. Skip the apology.
- "I know you are busy, but..." tells them their time does not count. Make the ask smaller.
- "Any update?" puts the work on them. Offer two options to choose from.
How long should you wait before bumping an email?
The right gap depends on what came before the silence. Treat these gaps as starting points and adjust them to how fast your buyers usually answer.
| Situation | Wait before the first bump | Why |
|---|---|---|
| Cold first touch | A few business days | Long enough for a busy week to pass, short enough that they still remember the subject |
| After a discovery call | One or two business days after the agreed next step was due | The call gave you permission, and the next step has a date |
| After a proposal | About a week | Proposals get passed on to finance or a manager, and that takes time |
| They asked you to check back later | The date they named, never earlier | Writing early tells them you were not listening |
| Internal colleague or partner | A day or two, sooner if a deadline is attached | Someone you work with expects a nudge, and often prefers a quick chat message |
After the first bump, let the gaps grow. In the sequences my team runs, it is usually the third follow-up that finally gets a reply, and only when real time has passed between sends. Teams that fire three emails in one week and move on to new names never reach it. Time does work that copy cannot, because budgets open and priorities shift.
The email platforms space it the same way. lemlist advises at least 2 days before the second email, then 4-day gaps through the fourth follow-up, then 5 or more days. Instantly suggests graduated gaps of 2, 4, 7 and 14 days. Neither publishes reply rates by gap, so these are vendor defaults, not proof.
Should you bump again, switch channel or stop?
A bump is one move in a longer plan. The table below covers the next move after each kind of answer, and a follow-up sequence that works shows how those moves chain together across a whole campaign.
| What you got back | Move | What to do |
|---|---|---|
| Nothing, after the first email | Bump | Context line, one new detail, one question |
| Nothing, after two bumps | Switch | A short LinkedIn message written fresh, never the email pasted in |
| Out-of-office reply | Wait | Bump a couple of days after the return date they gave |
| "Not now" or "try us in spring" | Pause | Log the date, stop the sequence, write again on that date |
| "Wrong person" | Redirect | Thank them, then write to the named person on a new thread |
| A clear no | Stop | One polite thank-you at most, then remove them from the sequence |
| Unsubscribe or "stop emailing me" | Stop for good | Suppress the address in every tool you use, the same day |
The switch row is the one people skip: email number seven goes out when the inbox has already said it is not working. I plan at least five or six touches per prospect, spread across more than one channel.
After two quiet bumps, the next touch is usually LinkedIn, where your face and profile do part of the work your email could not.
Nobody buys straight from an email. People look you up first, so the profile they land on has to back up what you wrote. In our campaigns, one message went out from two companies. One sender got 2% replies. The other got 7.5%. What changed was the foundations behind each sender.
A bump after a clear no is the fastest way to turn a lost deal into a spam complaint. If the no came with a reason you can answer honestly, that reply is a different email, covered in how to answer a not-interested reply.
The pause row only works if someone writes the date down. A "not now" in March can turn into a live opportunity by September if it sits in a CRM with a reminder. Any CRM will do, as long as no lead lives only in someone's inbox.
If you add a phone step, keep it warm. My team does not cold call; when a client wants calls, we ring only people who already replied, engaged or opted in.
What does normal silence look like?
Read silence against real numbers. In the campaigns my team runs, about 1% of people reply, and at thousands of emails a day that often drops to around 0.5%. Between 10% and 50% of those replies become booked meetings.
Very specific, strongly personalized campaigns can reach 15% to 17% replies, with roughly 75% of repliers showing interest. The rule behind all of it is simple: the higher the volume, the lower the average.
These are our campaign ranges, not a forecast for your list. Picture a small list: of 1,000 people contacted in a month, around 10 reply, and between 1 and 5 of those become meetings.
So most inboxes staying quiet is normal. Most of those people are busy, not ready or not interested this month. A bump adds a little to that number. A better list, a stronger offer or a second channel adds more.
When does a bump email hurt more than it helps?
Every bump is one more email from your domain, which means one more chance for a spam click. Gmail wants the share of recipients who mark you as spam under 0.10%, with 0.30% as a line you should never touch (Google Workspace Admin Help).
Its bulk-sender guidance adds that above 0.3%, a sender is no longer eligible for mitigation, which means you can no longer ask Google to help fix your delivery problems (Google Workspace Admin Help).
Put that in plain numbers: 0.3% is 3 complaints per 1,000 emails. That is why the stop rows in the table above matter as much as the templates.
Google's guidelines also advise against opening a subject line with Re: or Fwd: when the message is not truly a reply or forward. A bump sent as a reply on your own thread passes that test. A brand-new email with "Re:" pasted on to look like an old conversation fails it, and the reader sees through it the moment they search for the thread. For subject lines on fresh follow-ups, see follow-up email subject lines.
A bump also cannot rescue a sender that receiving servers distrust. Since 1 February 2024, Gmail requires all senders to set up SPF or DKIM (DNS records that prove a server may send mail for your domain), and senders above 5,000 daily messages must also add DMARC (the policy that tells inboxes what to do when those checks fail) (Gmail Help).
Microsoft went further for Outlook.com. Since 5 May 2025, Microsoft's Defender for Office 365 team says, high-volume domains (over 5,000 messages daily) get their mail rejected when SPF, DKIM or a DMARC record of at least p=none is missing or failing.
So the sending side comes first. My team runs every client and campaign on dedicated sending IPs, separate even between domains, and a single client can use 10 to 20.
Before the first message goes out, we set up the domains, SPF, DKIM and DMARC, warm-up and monitoring. Cold campaigns never use the domain that sends your invoices, and new mailboxes get warmed up before they write to a prospect.
If the list or the sender is broken, no wording helps. Fix the funnel first, then polish the bump.
Stuck on what to send when the first email gets no reply? Book a call and paste your last bump. I will tell you what I would change.
Questions people ask about bump emails
Is it rude to bump an email?
No, if it is one short note with a reason. It turns rude when the gap is shorter than the reader's normal reply time, when it lands at 11 pm their time, or when it copies their boss in to apply pressure. Send it in their working hours and keep the original recipients only.
Does CAN-SPAM apply to B2B follow-up emails?
Yes. The FTC's compliance guide makes no exception for business-to-business email. Each commercial message, bumps included, needs a clear opt-out and your valid postal address, opt-outs must be honored within 10 business days, and the guide states penalties that run into tens of thousands of dollars per violating email. This is not legal advice.
What about follow-ups to UK or German prospects?
UK PECR (the Privacy and Electronic Communications Regulations) regulation 22 requires consent for unsolicited marketing email to individual subscribers such as sole traders, with a narrow existing-customer exception (legislation.gov.uk). Germany's UWG section 7 treats email advertising without prior express consent as an unreasonable nuisance (gesetze-im-internet.de). Without a compliant basis, we skip cold email in Germany, Austria and the Czech Republic and use LinkedIn instead. This is not legal advice.
Can you bump someone on LinkedIn instead of email?
Yes, and for a cold prospect it is often the better second touch. If you are not connected yet, a connection request with a one-line note that names the topic of your email does the job of the bump. Once they accept, wait a day before writing, and let the email thread rest while LinkedIn does the work.
How do you bump an email to a coworker or partner?
Use the same shape with lower stakes. Name the deadline that makes your question matter, ask for the smallest possible answer, and offer five minutes in person. With a coworker, a chat message pointing to the email often works faster.
Coworker or cold prospect, the rule is the same. One new thing. One cheap question. And a stop rule you decide before you hit send.