The footer is the part of your email nobody designs, nobody tests, nobody reports on and nobody has looked at since the template was built.
It gets treated as the bit where legal requirements go and all of compliances boring wording, usually in six point grey text, and it is copied unchanged from campaign to campaign for years.
Which is a shame, because it is doing more work than a lot of other sections of your email, and it is the only part that gets read carefully by the people who are done with you.
Somebody who has decided to leave scrolls to the bottom and reads, which is a level of attention your hero image will never get. And what they find there determines whether they leave through the door that costs you nothing, or press the button that damages you with every mailbox provider you send to.
It is read by people at a decision point. Most of your email is skimmed. The footer is read by somebody who has actively scrolled looking for something, which makes it high intent even though it is low glamour.
It carries the exit, and the exit is a deliverability control. How easy you make leaving determines your complaint rate, and your complaint rate is the one metric with an enforced ceiling behind it.
It answers the question people ask before they complain. Why am I getting this. Somebody who can answer that question rarely reports you. Somebody who cannot, often does.
It is where trust is confirmed or lost. A real address, a real company name, a route to a human. Absent any of those, your email starts to resemble the scam mail your reader has already deleted twice this morning.
It is the last thing they see. Which matters more than its position suggests, because people weight endings heavily when they form an impression of an experience.
FYI - I do not do this, I am preaching it but yet to changing my emails (watch this space)
You are not choosing between somebody leaving and somebody staying. You are choosing between two exits, and they cost you wildly different amounts.
An unsubscribe is information. It removes one person from your list, it is invisible to mailbox providers as a negative signal, and it protects your engagement rates by removing somebody who was going to ignore you anyway.
A spam complaint is damage. It counts against you with the provider, it applies to your sending reputation rather than to that one relationship, and it degrades placement for everybody else on your list including the people who love you.
Behaviour follows the path of least resistance, and on a phone the junk button sits within very easy reach while your unsubscribe link is at the bottom of a long email behind a page load. So when leaving is harder than complaining, people complain, and you have designed that outcome yourself.
Putting a small, plain unsubscribe link in the preheader area or the top-right of the email closes the gap. Somebody who has already decided does not have to hunt, so the cheapest available action becomes the one that does not hurt you.
It also does something less obvious. A visible exit signals confidence, and confidence is read as trustworthiness. A sender who makes leaving easy is behaving like somebody who expects you to want to stay.
BUT we also have the one click unsubscribe now, so does this make it redundant? NO. Humans are creatures of habit and lots of humans have not mastered the one click unsubscribe habit yet.
Somebody will say this will increase our unsubscribe rate. It probably will, slightly, and that is the point rather than a side effect.
Plus WHO CARES?! Less people on your list who were never going to engage anyway. It's okay. It's fine. Chill.
The people who leave were not going to engage. Removing them raises the engagement rate of everybody who remains, which improves your placement, which means the people who do want you see more of your email. A slightly higher unsubscribe rate bought with a lower complaint rate is an excellent trade, and it is one almost nobody consciously makes.
The related objection is that it looks defeatist. It does not, because it is small and plain and the people who were staying will never notice it, in the same way nobody notices the fire exit in a restaurant they are enjoying.
Readers arrive at a footer with a small set of questions, mostly unspoken. The best footers answer all of them in about six lines.
The most valuable line in the whole footer and the one almost nobody includes. A single sentence saying you are receiving this because you signed up at a named event, downloaded a named thing, or bought from us, resolves the question that sits immediately behind most spam complaints.
People do not usually report mail because it is annoying. They report it because they do not recognise it, and unrecognised mail feels like something that should not be there. A reminder of the relationship is the cheapest complaint prevention available to you, and it costs one line.
The preference link, sitting next to the unsubscribe rather than hidden behind it. Plenty of people want fewer emails or a different topic rather than nothing at all, and offering only a binary choice pushes them to the more destructive of the two options.
Worth being careful here though. A preference centre used as an obstacle, where unsubscribe routes through six questions before it lets you leave, is a dark pattern and it converts a departure into a complaint. Offer less as a genuine alternative, positioned alongside the exit rather than in front of it.
The legal entity name, not just the trading brand. Particularly where the two differ, because a recipient who does not recognise the name in the footer treats the whole email as suspicious.
A physical postal address. Required in several jurisdictions, and it does trust work independently of the requirement. Scam email rarely carries a real address.
Company registration details where relevant. Low cost, and it signals a real organisation rather than a landing page.
A reply-to that goes somewhere monitored, and ideally a named route for anybody with a problem. The footer is where somebody with a complaint looks first, and a message that offers no route to a person leaves the junk button as the only available form of feedback.
Which also means never sending from a noreply address, since it announces that you are not listening and it throws away replies, and a reply is the least gameable positive engagement signal you can generate.
Social links, app links, the help centre. Useful, and worth keeping modest, because a footer stuffed with twelve icons is harder to navigate and pushes the unsubscribe further down the screen. But no one really cares about this tbf. Social buttons on email are like dinasors - they are dead (but I have FOMO so keep them on my email)
A frequency statement. You are receiving this weekly. Sets expectation, and expectation is what satisfaction is measured against.
A view in browser link, placed sensibly. Very useful when rendering fails, and often the only route somebody has to your content when their client mangles the email.
A forward-to-a-friend prompt, occasionally. The footer is read by engaged people as well as departing ones, and a forwarded email is worth more than most of your acquisition.
A quiet line acknowledging why the email might have changed. After a rebrand or a from-address change, the footer is where somebody checks whether this is legitimate.
Almost every accessibility failure I find in a template is concentrated in the footer, because it is the part designed last, by somebody who has stopped caring, with the goal of making it visually recede.
Contrast is usually the worst in the email. Grey on white at nine point is a common footer treatment and it fails the minimum contrast ratio comfortably. The unsubscribe is frequently the lowest-contrast text on the page, which is a deliberate choice somebody made.
Text size is too small. Twelve point minimum for footer text, and there is no legal or design reason it needs to be smaller than your body copy.
Tap targets are too tight. A row of small links separated by pipe characters is close to unusable on a phone, and it produces mis-taps that look like engagement while frustrating the reader.
Unsubscribe built as an image. Invisible with images off, invisible to a screen reader, and it converts a would-be unsubscriber into a complainant.
Dark mode breaks it. Footers full of grey-on-white text and black logos are exactly what forced inversion handles worst.
The fix is unglamorous: make the footer legible!!!! PLEASE. Adequate contrast, readable size, real text, spacing between links. It will not win an award and it will reduce your complaint rate.
Anything designed to make leaving harder. Multi-step exits, login walls, confirmation screens that do not confirm, and unsubscribe links that lead to a preference page with no unsubscribe option. Every one of these converts a clean departure into reputational damage.
Guilt language. Are you sure you want to miss out. It does not retain anybody and it sours the last impression somebody has of you, which is the impression that sticks.
Twelve social icons. Pick the two platforms where you would reply to somebody, and drop the rest.
Stale content. Links to a campaign from two years ago, an office that has moved, a person who has left. Footers rot quietly because nobody reads their own.
Legal text nobody wrote deliberately. Long disclaimers inherited from a corporate email signature serve no purpose in a marketing email and push the unsubscribe further from reach.
The footer is the only part of your email that speaks to people who are leaving, people who are suspicious, and people who want to stay but differently. Three audiences your campaign content never addresses, all arriving on the same screen, all making a decision.
Design it for those three and the rest follows. Put the exit where somebody who wants it can find it, at the top as well as the bottom. Tell them why they are receiving this. Offer less as an alternative to none. Prove you are a real organisation with a real address and a real person at the end of a reply.
Do that and your complaint rate falls, your engagement rate rises because the people who left were never going to engage, and your placement improves for everybody who stayed. All from the part of the email nobody thinks is worth designing.