diff --git a/mon-entreprise/source/components/NewsletterRegister.tsx b/mon-entreprise/source/components/NewsletterRegister.tsx
index 177a3ae2a..8a7af806a 100644
--- a/mon-entreprise/source/components/NewsletterRegister.tsx
+++ b/mon-entreprise/source/components/NewsletterRegister.tsx
@@ -1,19 +1,62 @@
 import { usePersistingState } from 'Components/utils/persistState'
 import { TrackerContext } from 'Components/utils/withTracker'
-import React, { useContext } from 'react'
+import React, { useContext, useRef, useState } from 'react'
 import { Trans, useTranslation } from 'react-i18next'
+import emoji from 'react-easy-emoji'
+import * as animate from 'Components/ui/animate'
+
+// We don't want to load the full sendinblue iframe, so we reimplement a simple
+// logic to the a HTTP Post request to their URL with the email data.
+const formInfos = {
+	method: 'post',
+	action:
+		'https://b713d5c4.sibforms.com/serve/MUIEAEJui5ynU5AtcKQfxhATKzruDK8yC3YO4M56ltHV6LXHnZPESWHRjwK6Dtp3GgPqu49TljpGSa4Iy-BbaqLArDYDt5mEYtvOkrPD2b5siSNsthqi9kDz8wbljxKSDRbOQztsjyp3InDR1EUrTZJvyAk9YEkXtANb5upeHfN2VTF2m6lRiyOMF9B5VfD6jWGyxJaSNR8gsVQo?isAjax=1'
+}
 
 export default function NewsletterRegister() {
 	const [userIsRegistered, setUserIsRegistered] = usePersistingState(
 		'app::newsletter::registered',
 		false
 	)
+	const formElement = useRef<HTMLFormElement>(null)
+	const [userJustRegistered, setUserJustRegistered] = useState(false)
 	const { t, i18n } = useTranslation()
 	const tracker = useContext(TrackerContext)
 
-	const onSubmit = () => {
-		tracker.push(['trackEvent', 'Newsletter', 'registered'])
-		setTimeout(() => setUserIsRegistered(true), 0)
+	const onSubmit = (evt: React.FormEvent<HTMLFormElement>) => {
+		evt.preventDefault()
+		if (!formElement.current) {
+			return
+		}
+		fetch(formInfos.action, {
+			method: formInfos.method,
+			body: new FormData(formElement.current)
+		}).then(() => {
+			tracker.push(['trackEvent', 'Newsletter', 'registered'])
+			setUserIsRegistered(true)
+			setUserJustRegistered(true)
+		})
+	}
+
+	if (userJustRegistered) {
+		return (
+			<animate.fromBottom>
+				<div
+					className="ui__ light-border"
+					css={`
+						text-align: center;
+						background: var(--lighterColor);
+					`}
+				>
+					<h4>
+						{emoji('🎉')}{' '}
+						<Trans i18nKey="newsletter.register.confirmation">
+							Votre inscription est confirmée !
+						</Trans>
+					</h4>
+				</div>
+			</animate.fromBottom>
+		)
 	}
 
 	if (i18n.language !== 'fr' || userIsRegistered) {
@@ -35,26 +78,23 @@ export default function NewsletterRegister() {
 
 				<form
 					className="footer__registerContainer"
-					action="https://gouv.us13.list-manage.com/subscribe/post?u=732a4d1b0d2e8a1a1fd3d01db&amp;id=f146678e48"
-					method="post"
+					ref={formElement}
 					onSubmit={onSubmit}
-					id="mc-embedded-subscribe-form"
-					name="mc-embedded-subscribe-form"
-					target="_blank"
+					id="sib-form"
 				>
 					<div>
-						<label htmlFor="mce-EMAIL">
+						<label htmlFor="EMAIL">
 							<Trans>Votre adresse e-mail</Trans>
 						</label>
 						<div className="footer__registerField">
-							<input type="email" name="EMAIL" id="mce-EMAIL" />
+							<input type="email" name="EMAIL" id="EMAIL" />
 							<input
 								className="ui__ plain small button"
 								type="submit"
 								value={t("S'inscrire")!}
 								name="subscribe"
-								id="mc-embedded-subscribe"
 							/>
+							<input type="hidden" name="locale" value={i18n.language} />
 						</div>
 					</div>
 				</form>
diff --git a/mon-entreprise/source/locales/ui-en.yaml b/mon-entreprise/source/locales/ui-en.yaml
index 94ce58447..009ddf5cb 100644
--- a/mon-entreprise/source/locales/ui-en.yaml
+++ b/mon-entreprise/source/locales/ui-en.yaml
@@ -806,6 +806,7 @@ montant à atteindre: minimum value
 multiplicateur: multiplier
 newsletter:
   register:
+    confirmation: Your registration is confirmed!
     description: >
       Subscribe to our monthly newsletter to receive <2>official advice on
       starting a business</2> and access new features in advance.