Why do my campaign emails include an unsubscribe link?

Short answer: every campaign email gives the recipient a way to opt out, and that part is always present — it's required for compliant commercial and cold email and it protects your deliverability. What you do choose is how it looks and what it says. Pick the classic unsubscribe link, or pick "Reply to opt out", where the footer simply asks the recipient to reply and there's no clickable third-party link in your email at all. Then write the sentence in your own words — Not for you? Reply "stop" and I'll remove you — and, if you'd rather it sat inside your message than under it, drop {{opt_out}} into your body or signature. Both styles are honoured automatically, both keep you compliant, and you can preview the exact result before you send. So the question isn't "can I remove it?" — it's "how should mine read?"

WarmySender runs your outreach on autopilot with AI agents, across Cold Email, Email Warmup, LinkedIn, Instagram and Multichannel sequences — plus real-time email verification. Your opt-out style is part of the Cold Email channel: it keeps your sending compliant and your reputation healthy so more of your mail reaches the inbox. You can even change it in plain language — ask your agent "switch my workspace to reply-to-opt-out" and it's done.

Choose how recipients opt out

Open Settings → Account and look just under Company Address for How recipients opt out. There are two choices:

When to pick which. If you send a lot of mail to one provider — in the region of thousands of messages a day to Gmail addresses — the big providers' sender guidelines expect a visible unsubscribe link plus the invisible instruction that lets a mail app offer its own one-tap unsubscribe. At that scale the Unsubscribe link style is the right choice, and it's the default for exactly that reason. Below that level, the same guidelines simply ask for an easy way to unsubscribe — and a clearly-worded "just reply" instruction is one. So if your campaigns read like personal, one-to-one emails and you're sending at normal outreach volumes, Reply to opt out is usually the better fit: it keeps your message looking like a note from a person rather than a mailing.

What changed on the reply style. When you choose Reply to opt out, your emails now carry no invisible unsubscribe instruction at all — so mail apps have nothing to hang their own unsubscribe button on, and they no longer badge your message as a mailing. That badge is the whole point of the invisible instruction: it's what tells an app "this is bulk mail, offer the reader a way out". A one-to-one email doesn't carry it, so now yours doesn't either. Nothing is lost on the compliance side — the visible sentence is still there in every message, and replies are still honoured automatically. On the Unsubscribe link style the invisible instruction stays, which is what you want at volume.

How to change it. Settings → Account → How recipients opt out → pick a style, write your sentence → Save. It applies to every campaign in that workspace from your next send onward; mail already in someone's inbox keeps the footer it was sent with. Or just tell your AI agent in plain language — "switch my workspace to reply-to-opt-out", or "change our opt-out wording to 'Not for you? Reply stop and I'll remove you'" — and it updates the setting for you. Your agent never sends anything itself; it only changes the setting, and WarmySender's scheduler keeps every send inside your safe limits either way.

Write the opt-out in your own words

The opt-out doesn't have to say "Unsubscribe". In Settings → Account, the Opt-out sentence field takes anything from 4 to 120 characters, and whatever you type becomes the opt-out — on the link style it's the clickable text, on the reply style it's the line that opens a reply to your mailbox. Leave it alone and you get the sensible defaults: Unsubscribe on the link style, Reply "unsubscribe" to opt out on the reply style.

Some wording that reads like a person wrote it:

• Not for you? Reply "stop" and I'll remove you
• Prefer not to hear from me? Let me know and I'll stop
• Wrong person? Reply and I'll take you off the list
• No longer interested? Unsubscribe here

Two things to keep in mind. Make it unmistakably an opt-out — "click here" or "more info" leaves the recipient guessing, and a confused recipient reaches for the spam button instead. And if you're on the reply style, ask for a reply, because that's the action that actually works. Your agent can set this too: "set our opt-out sentence to 'Not for you? Reply stop and I'll remove you'".

Use different wording for one campaign

The sentence in Settings → Account is your workspace default, and every campaign uses it until you choose otherwise. If you run campaigns in more than one language — or to very different audiences — you can give a single campaign its own wording without touching the rest. Open that campaign's Review & Launch step, find How recipients opt out, choose Use different wording for this campaign, and type the sentence into Opt-out sentence for this campaign. You can pick the style for that campaign too, under How they opt out of this campaign. If the campaign already exists, click Save changes — saving never starts, pauses or resumes it, so a paused campaign stays paused until you resume it. Choose Use my workspace setting at any time and the campaign follows your workspace again.

For example, a workspace whose default reads Responder con "Fuera" para no recibir estos emails. can give its Brazilian campaign Responda "Sair" para não receber mais emails. The footer preview and a test send from that campaign both show its own sentence, so what you check is what recipients get.

A quoted word works per campaign too: a reply of just Sair removes that person.

Put the opt-out inside your email with {{opt_out}}

By default the opt-out sits on a quiet line appended under your message. If you'd rather have it read as part of your writing — tucked into your sign-off, or right after your last sentence — put {{opt_out}} where you want it. It renders as your opt-out sentence, in whichever style your workspace uses, and the appended line then carries only your company address.

In a signature, for example:

Best,
Sarah Whitfield
Acme Ltd

{{opt_out}}

Sent on the reply style with a custom sentence, that goes out as Best, Sarah Whitfield, Acme Ltd followed by Not for you? Reply "stop" and I'll remove you, and underneath, in small grey text, just 12 High Street, Bristol BS1 4ST.

You can use it in the body, in your {{signature}}, or both — the sentence appears in every place you put the token, so most people use it once. Want space above it? Add a blank line before the token. And if you forget it, nothing breaks: the full line is appended as usual, so a campaign email can never go out without an opt-out.

What the footer looks like now

The appended line used to open with "Sent by" and your company name. It doesn't any more — your name is already in the From line the recipient is reading, so repeating it underneath added nothing except the shape of a mailing header. Here's the same email, before and after:

Shorter, quieter, and it reads like the bottom of a normal email. If you haven't set a company address the address is simply left out, and the line is your opt-out sentence on its own — though it's worth filling the address in, because a real business address is a compliance expectation and a trust signal.

Put the link on your own domain

If you stay on the Unsubscribe link style, the single biggest improvement you can make is to put that link on your own domain instead of the shared one everybody starts on. A footer link pointing at a domain the recipient has never heard of looks like a mailing-list send; a link on your domain matches the address the email came from and reads as your own correspondence.

Set it up in Settings → Tracking: add a subdomain of your sending domain — something like track.yourcompany.com — add the DNS record it shows you, then click Verify. It has to be a subdomain: if you type your bare domain (yourcompany.com) the field won't accept it and will suggest the track. version instead, because pointing your bare domain at us would take your own website offline. Once it's verified, your unsubscribe and click links use it automatically. If a verified domain ever stops answering, your campaigns fall back to the shared domain and keep sending — a tracking domain can never block your mail.

Full walkthrough: how to use your own tracking domain. And if you'd rather have no third-party link in the email at all, that's exactly what the Reply to opt out style gives you.

Replies that say "unsubscribe" are handled for you

Whichever style you choose, you never have to police your own inbox for opt-out requests. When someone writes back asking to be removed, WarmySender recognises it and acts on it — the same way a click would.

• What's recognised. Replies along the lines of unsubscribe, opt out, remove me, take me off your list, stop emailing me and do not contact me — plus the everyday equivalents in German, French, Spanish, Portuguese, Dutch and Italian.
• What isn't. "Not interested", "no thanks", "wrong person" and similar brush-offs are not treated as opt-outs. They're ordinary replies: the sequence stops for that person if you have Stop on reply switched on, and they stay contactable in future campaigns. Only a genuine request to be removed triggers an opt-out, because there's a real difference between "not right now" and "never again".
• What happens. The person is unsubscribed across your whole workspace and added to your suppression list, the campaign stops for them immediately, and it's counted as an unsubscribe in your reporting rather than as a reply — so your numbers stay honest and no other campaign of yours can email them again.

That's why the reply style is a real opt-out and not a promise: the request is honoured automatically, whether or not you ever open the message.

See your footer before you send

You never have to guess what recipients will see. The exact footer — your address and your opt-out sentence, in whichever style you chose — is shown in three places:

• In Settings. Right under the setting itself, a live preview updates as you switch styles, retype your sentence or edit your company details.
• In the campaign wizard. The email preview shows the footer underneath your message body, exactly as it will go out.
• Before you launch. A compact Footer check card flags the two things worth fixing first — an unsubscribe link still on the shared domain, and a missing company address — each with a one-click fix.

Both of those flags are worth clearing. A missing postal address is a compliance gap, and a shared-domain link is the most obvious "this is bulk mail" tell in an otherwise personal-looking email.

Why a footer can make your mail look like a newsletter

Inbox providers sort mail using hundreds of signals, and nobody outside those companies can see the recipe. What we can be straight with you about is this: we cannot tell you which tab your mail landed in, and neither can anyone else — providers don't report it. So no honest tool can promise you a particular tab, and we won't.

What we can do is remove the bulk-mail signals that are within your control. A message that carries a clickable link on a domain unrelated to the sender, an invisible unsubscribe instruction that makes mail apps badge it as a mailing, and a "Sent by …" block under the sign-off, is shaped like a mailing — because that's exactly what those things are built for. A short personal note that asks the recipient to reply looks like correspondence instead. Choosing Reply to opt out drops the invisible instruction and the third-party link; the appended line no longer repeats your company name; and putting your unsubscribe link on your own domain fixes the domain mismatch if you'd rather keep the link. None of that is a guarantee of placement, and anyone claiming otherwise is guessing.

The other levers matter just as much: authenticate your domain, keep your list clean with email verification, warm your mailbox up, and write like a person. See why emails go to spam for the full picture.

Why an opt-out beats a spam complaint — every time

It's worth being crystal clear about this, because it's why the opt-out is always there in one form or another:

An easy opt-out steers unhappy recipients toward the harmless option. That's why the opt-out itself can't be removed: you'd trade quiet opt-outs for spam complaints, and lose far more reach than you'd gain. Choosing the reply style doesn't remove it — it just changes the door people leave by.

Why the opt-out itself can't be removed

Anti-spam laws such as CAN-SPAM in the United States and GDPR in Europe expect commercial and cold email to carry a clear, working way to opt out and a real sender identity. On top of the legal side, an easy opt-out is what keeps recipients away from the spam button. So WarmySender never sends a campaign email without one — but it does let you decide which form it takes, which is the part most people actually wanted.

Warmup emails are different and separate — they're the friendly reputation-building mail behind the scenes, not commercial outreach, so this is specifically about your campaign emails.

Fill in your company details either way

Both styles read better with your company details filled in — and one of them is a compliance expectation, not a nicety. In Settings → Account:

• Set your mailing address. A real business postal address is both a compliance expectation and a strong trust signal — it tells recipients that a legitimate organisation stands behind the mail. It's the first half of the appended line, and the pre-launch Footer check flags it if it's missing.
• Set your company name. It no longer appears in the appended line, but it still sets the name recipients see in the From line of your email — which is the place that actually matters.
• Write your opt-out sentence. Four to 120 characters, in your own voice. Leave it blank and you get the sensible default for your style.

With those filled in, your footer reads like professional correspondence from an identifiable company with a clean way out. Take a minute to set this before your first send.

A quick example

Imagine two versions of the same short outreach email. In the first, the footer is a bare unsubscribe link on a domain the recipient has never seen, with no company details — it looks like a mailing, and a wary recipient is more likely to hit "spam". In the second, you've set your address in Settings → Account, chosen Reply to opt out, and written your own sentence, so the message ends:

Best,
Sarah

Not for you? Reply "stop" and I'll remove you
12 High Street, Bristol BS1 4ST

No third-party link anywhere in the message, no invisible unsubscribe instruction for a mail app to badge, and no "Sent by" block repeating what the From line already said. If Sarah had put {{opt_out}} in her signature, that sentence would sit right under her name and the appended line would be the address alone.

The second version reads like a genuine person reaching out — and if the recipient does write back "stop", they're opted out automatically across your workspace, exactly as a click would have done. Same protection, same compliance, a completely different impression.

Frequently asked questions

Can I remove the unsubscribe link?

You can't remove the opt-out itself, but you can change its form and its wording — which is what most people are really after. In Settings → Account, under Company Address, "How recipients opt out" lets you switch from the classic unsubscribe link to "Reply to opt out", and the Opt-out sentence field lets you write the line yourself. With the reply style, your footer asks the recipient to reply instead of clicking, and there's no third-party link in the email at all. The opt-out stays because it's a legal expectation for commercial and cold email and because an easy exit keeps people away from the spam button — but which door they leave by, and what the sign on it says, is your call.

Can I change the wording?

Yes. Settings → Account has an Opt-out sentence field: type anything from 4 to 120 characters and that becomes your opt-out. On the unsubscribe-link style it's the clickable text; on the reply style it's the line that opens a reply to your mailbox. So instead of a bare "Unsubscribe" you can send Not for you? Reply "stop" and I'll remove you or Wrong person? Let me know and I'll take you off the list. Leave it blank and you get the default for your style — "Unsubscribe", or 'Reply "unsubscribe" to opt out'. Keep it unmistakable: wording like "click here" leaves the recipient guessing, and a guessing recipient reaches for the spam button. Your agent can set it for you too — just say what you want it to read.

Can one campaign use different wording from the rest?

Yes. The sentence in Settings → Account is the default for every campaign. To change it for one campaign — say, one written in another language — open its Review & Launch step, choose Use different wording for this campaign under How recipients opt out, and type the new sentence. Your other campaigns keep the workspace wording, and choosing Use my workspace setting switches that campaign back.

Can I put it in my signature?

Yes — put {{opt_out}} wherever you want it, in the email body or inside your signature. It renders as your opt-out sentence in whichever style your workspace uses, and the line appended at the bottom then carries only your company address, so nothing is duplicated. That's the tidiest result: the opt-out reads as part of your sign-off rather than as a footer bolted underneath. If you leave the token out — or forget it on one campaign — nothing breaks: the full line is appended as usual, because a campaign email is never sent without an opt-out.

Why did "Sent by my company" disappear from the footer?

We removed it deliberately. The line now reads your address · your opt-out sentence, and the "Sent by …" prefix is gone. Your company name is already in the From line the recipient is looking at when they open the message, so repeating it underneath told them nothing new — it just gave your email the shape of a mailing-list footer, which is the opposite of what a one-to-one email should look like. Your company name still matters and is still worth setting: it's what recipients see as the sender. If you had no company address set, the appended line is now simply your opt-out sentence on its own.

Which style should I use for cold outreach?

For 1:1-style cold outreach at normal volumes, "Reply to opt out" is usually the better fit: your email carries no third-party link, no invisible unsubscribe instruction for a mail app to badge as a mailing, and reads like a note from a person. If you send at high volume to one provider — in the region of thousands of messages a day to Gmail addresses — use the classic unsubscribe link instead, because sender guidelines at that scale expect a visible link plus the invisible instruction. Below that level, an easy, clearly-worded way to unsubscribe is what's asked for, and a reply instruction meets it. Whichever you choose, put your postal address in Settings and give the sentence a read out loud.

What happens when someone replies "unsubscribe"?

It's honoured automatically, in both styles. WarmySender recognises replies asking to be removed — unsubscribe, opt out, remove me, take me off your list, stop emailing me, do not contact me, and the everyday equivalents in German, French, Spanish, Portuguese, Dutch and Italian — and unsubscribes that person across your whole workspace, stops the campaign for them immediately, and counts it as an unsubscribe rather than a reply. You don't have to spot it yourself. "Not interested" and "no thanks" are deliberately not treated as opt-outs: those stay ordinary replies, so a soft brush-off doesn't remove someone from your list for good.

Can I put the unsubscribe link on my own domain?

Yes, and it's worth doing. Add a subdomain of your sending domain in Settings → Tracking — it has to be a subdomain such as track.acme.com, and the field will say so and offer the corrected version if you type your bare domain — then add the DNS record shown and click Verify; from then on your unsubscribe and click links use your own domain instead of the shared one. A link that matches the address the mail came from looks like your own correspondence rather than a mailing. If a verified domain ever stops answering, campaigns fall back to the shared domain and keep sending, so this can never block your mail. Alternatively, choose "Reply to opt out" and your emails carry no tracking link at all.

How do I see my footer before I send?

In three places. Settings → Account shows a live preview right under the opt-out setting, updating as you switch styles, retype your sentence or edit your company details. The campaign wizard's email preview shows the same footer under your message body — and if you've used {{opt_out}}, you'll see it rendered in place there too. And before you launch, a compact Footer check card flags an unsubscribe link still on the shared domain or a missing company address, each with a one-click fix. Clearing both is the quickest win available on any campaign.

Won't an opt-out make me lose contacts and hurt my results?

Almost always the opposite. Someone who opts out wasn't going to convert, and letting them leave quietly is far better than the alternative — them marking you as spam. A spam complaint tells inbox providers your mail is unwanted and drags down your reputation for everyone you email, while an opt-out simply removes one uninterested person and leaves your reputation untouched. The opt-out protects the deliverability of every other email you send.

Do my warmup emails include one too?

This applies to your campaign emails — the commercial outreach you send to prospects. Warmup is separate: it's the friendly, reputation-building mail that runs behind the scenes to keep your mailbox in good standing, not commercial outreach to your list. So when we talk about the opt-out and its two styles, we mean your campaigns.

Will switching to the reply style get me into the Primary tab?

Nobody can promise that, and we won't. Mail providers don't report which tab a message was filed under, so no tool — ours included — can tell you where your mail landed or guarantee a particular tab. What the reply style does is remove the bulk-mail signals that are within your control: no third-party link, no invisible unsubscribe instruction for a mail app to badge your message with, and no "Sent by …" block under your sign-off. Combine that with an authenticated domain, a verified list, a warmed-up mailbox and copy that reads like a person, and you've done everything that's actually in your hands.

Related reading

• Use your own tracking domain — put your links on a domain that matches your sending address
• Cold email, done right — how compliant, reputation-safe sending gets you into the inbox
• Email Deliverability FAQ — why low spam complaints and clean lists protect your sender reputation
• Why are my emails going to spam? — the signals inbox providers watch, and how to fix them
• Set up campaign sequences — build multi-step campaigns with delays and conditions
• Full documentation — Cold Email, Email Warmup, LinkedIn, Instagram and Multichannel guides