diff --git a/Mail/Views/Thread/Message/MessageBannerHeaderView.swift b/Mail/Views/Thread/Message/MessageBannerHeaderView.swift
index 4392cd6cd4..9f86550319 100644
--- a/Mail/Views/Thread/Message/MessageBannerHeaderView.swift
+++ b/Mail/Views/Thread/Message/MessageBannerHeaderView.swift
@@ -30,6 +30,7 @@ struct MessageBannerHeaderView: View {
     @EnvironmentObject private var mailboxManager: MailboxManager
 
     @State private var isUnsubscribeSuccessful = false
+    @State private var isAcknowledgeSuccessful = false
 
     let banners: [MessageBanner]
 
@@ -79,6 +80,22 @@ struct MessageBannerHeaderView: View {
                         asyncAction: unsubscribeAction
                     )
                 }
+            case .acknowledge:
+                if !isAcknowledgeSuccessful && message.hasPendingAcknowledgement {
+                    MessageHeaderAsyncActionView(
+                        icon: MailResourcesAsset.envelope.swiftUIImage,
+                        message: MailResourcesStrings.Localizable.acknowledgementMessage,
+                        actionTitle: MailResourcesStrings.Localizable.sendConfirmationAction,
+                        showBottomSeparator: showBottomSeparator,
+                        asyncAction: acknowledgeAction
+                    )
+                } else {
+                    MessageHeaderActionView(
+                        icon: MailResourcesAsset.check.swiftUIImage,
+                        message: MailResourcesStrings.Localizable.acknowledgementMessageSent,
+                        showBottomSeparator: showBottomSeparator
+                    ) {}
+                }
             }
         }
     }
@@ -106,6 +123,24 @@ struct MessageBannerHeaderView: View {
             snackbarPresenter.show(message: MailResourcesStrings.Localizable.snackbarUnsubscribeFailure)
         }
     }
+
+    private func acknowledgeAction() async {
+        @InjectService var snackbarPresenter: IKSnackBarPresentable
+        do {
+            try await mailboxManager.apiFetcher.acknowledgeMessage(messageResource: message.resource)
+            try mailboxManager.transactionExecutor.writeTransaction { realm in
+                if let live = realm.object(ofType: Message.self, forPrimaryKey: message.uid) {
+                    live.acknowledgeStatus = .acknowledged
+                }
+            }
+            snackbarPresenter.show(message: MailResourcesStrings.Localizable.snackbarAcknowledgementSuccess)
+            withAnimation {
+                isAcknowledgeSuccessful = true
+            }
+        } catch {
+            snackbarPresenter.show(message: MailResourcesStrings.Localizable.snackbarAcknowledgementFailure)
+        }
+    }
 }
 
 #Preview {
diff --git a/Mail/Views/Thread/Message/MessageSubHeaderView.swift b/Mail/Views/Thread/Message/MessageSubHeaderView.swift
index 16e21a5eb9..4fabcbf4b4 100644
--- a/Mail/Views/Thread/Message/MessageSubHeaderView.swift
+++ b/Mail/Views/Thread/Message/MessageSubHeaderView.swift
@@ -58,6 +58,10 @@ struct MessageSubHeaderView: View {
             result.append(.encrypted)
         }
 
+        if message.hasAcknowledgement {
+            result.append(.acknowledge)
+        }
+
         return result
     }
 
diff --git a/MailCore/API/Endpoint/Endpoint.swift b/MailCore/API/Endpoint/Endpoint.swift
index 8bab70c1a8..63798f2024 100644
--- a/MailCore/API/Endpoint/Endpoint.swift
+++ b/MailCore/API/Endpoint/Endpoint.swift
@@ -340,4 +340,8 @@ public extension Endpoint {
     static func unsubscribe(resource: String) -> Endpoint {
         return .resource(resource).appending(path: "/unsubscribeFromList")
     }
+
+    static func acknowledge(resource: String) -> Endpoint {
+        return .resource(resource).appending(path: "/acknowledge")
+    }
 }
diff --git a/MailCore/API/MailApiFetcher/MailApiFetcher+Extended.swift b/MailCore/API/MailApiFetcher/MailApiFetcher+Extended.swift
index 7e668b1f64..78c628e913 100644
--- a/MailCore/API/MailApiFetcher/MailApiFetcher+Extended.swift
+++ b/MailCore/API/MailApiFetcher/MailApiFetcher+Extended.swift
@@ -223,4 +223,8 @@ public extension MailApiFetcher {
     func unsubscribe(messageResource: String) async throws {
         let _: Empty = try await perform(request: authenticatedRequest(.unsubscribe(resource: messageResource), method: .post))
     }
+
+    func acknowledgeMessage(messageResource: String) async throws {
+        let _: Empty = try await perform(request: authenticatedRequest(.acknowledge(resource: messageResource), method: .get))
+    }
 }
diff --git a/MailCore/Cache/MailboxManager/MailboxManager+Thread.swift b/MailCore/Cache/MailboxManager/MailboxManager+Thread.swift
index 75a1d9976f..6db6b7efc8 100644
--- a/MailCore/Cache/MailboxManager/MailboxManager+Thread.swift
+++ b/MailCore/Cache/MailboxManager/MailboxManager+Thread.swift
@@ -528,7 +528,7 @@ public extension MailboxManager {
     }
 
     private func upsertMessage(_ message: Message, oldMessage: Message, threadsToUpdate: inout Set<Thread>, using realm: Realm) {
-        keepCacheAttributes(for: message, keepProperties: .standard, using: realm)
+        keepCacheAttributes(for: message, keepProperties: [.standard, .acknowledge], using: realm)
         realm.add(message, update: .modified)
 
         threadsToUpdate.formUnion(oldMessage.threads)
diff --git a/MailCore/Cache/MailboxManager/MailboxManager.swift b/MailCore/Cache/MailboxManager/MailboxManager.swift
index 3bfda2dc13..8a4b89f09d 100644
--- a/MailCore/Cache/MailboxManager/MailboxManager.swift
+++ b/MailCore/Cache/MailboxManager/MailboxManager.swift
@@ -75,7 +75,7 @@ public final class MailboxManager: ObservableObject, MailboxManageable {
         let realmName = "\(mailbox.userId)-\(mailbox.mailboxId).realm"
         realmConfiguration = Realm.Configuration(
             fileURL: MailboxManager.constants.rootDocumentsURL.appendingPathComponent(realmName),
-            schemaVersion: 47,
+            schemaVersion: 48,
             migrationBlock: { migration, oldSchemaVersion in
                 // No migration needed from 0 to 16
                 if oldSchemaVersion < 17 {
@@ -187,6 +187,7 @@ public final class MailboxManager: ObservableObject, MailboxManageable {
         static let localSafeDisplay = MessagePropertiesOptions(rawValue: 1 << 3)
         static let reactions = MessagePropertiesOptions(rawValue: 1 << 4)
         static let calendarEventResponse = MessagePropertiesOptions(rawValue: 1 << 5)
+        static let acknowledge = MessagePropertiesOptions(rawValue: 1 << 6)
 
         static let standard: MessagePropertiesOptions = [
             .fullyDownloaded,
@@ -228,6 +229,10 @@ public final class MailboxManager: ObservableObject, MailboxManageable {
         if keepProperties.contains(.calendarEventResponse), let calendarEventResponse = savedMessage.calendarEventResponse {
             message.calendarEventResponse = calendarEventResponse.detached()
         }
+        if keepProperties.contains(.acknowledge),
+           message.acknowledge == nil {
+            message.acknowledge = savedMessage.acknowledge
+        }
     }
 
     func keepCacheAttributes(
diff --git a/MailCore/Models/Message.swift b/MailCore/Models/Message.swift
index 41317542cb..a42e00849b 100644
--- a/MailCore/Models/Message.swift
+++ b/MailCore/Models/Message.swift
@@ -83,6 +83,11 @@ public enum MessageDKIM: String, Codable, PersistableEnum {
     case notSigned = "not_signed"
 }
 
+public enum AcknowledgeStatus: String {
+    case pending
+    case acknowledged
+}
+
 public struct MessageActionResult: Codable {
     public var flagged: Int
 }
@@ -163,6 +168,7 @@ public final class Message: Object, Decodable, ObjectKeyIdentifiable {
     @Persisted public var encrypted: Bool
     @Persisted public var encryptionPassword: String
     @Persisted public var cryptPasswordValidity: Date?
+    @Persisted var acknowledge: String?
     @Persisted private var headers: MessageHeaders?
     /// Threads where the message can be found
     @Persisted(originProperty: "messages") var threads: LinkingObjects<Thread>
@@ -289,6 +295,22 @@ public final class Message: Object, Decodable, ObjectKeyIdentifiable {
         return !reactionMessages.where { $0.seen == false }.isEmpty
     }
 
+    public var acknowledgeStatus: AcknowledgeStatus? {
+        get {
+            return AcknowledgeStatus(rawValue: acknowledge ?? "")
+        } set {
+            acknowledge = newValue?.rawValue
+        }
+    }
+
+    public var hasAcknowledgement: Bool {
+        return hasPendingAcknowledgement || acknowledgeStatus == .acknowledged
+    }
+
+    public var hasPendingAcknowledgement: Bool {
+        return acknowledgeStatus == .pending
+    }
+
     public func fromMe(currentMailboxEmail: String) -> Bool {
         return from.contains { $0.isMe(currentMailboxEmail: currentMailboxEmail) }
     }
@@ -379,6 +401,7 @@ public final class Message: Object, Decodable, ObjectKeyIdentifiable {
         case emojiReaction
         case emojiReactionNotAllowedReason
         case headers
+        case acknowledge
     }
 
     override init() {
@@ -459,6 +482,7 @@ public final class Message: Object, Decodable, ObjectKeyIdentifiable {
         )
 
         headers = try? values.decodeIfPresent(MessageHeaders.self, forKey: .headers)
+        acknowledge = try values.decodeIfPresent(String.self, forKey: .acknowledge)
     }
 
     public convenience init(
@@ -498,7 +522,8 @@ public final class Message: Object, Decodable, ObjectKeyIdentifiable {
         snoozeUuid: String? = nil,
         snoozeEndDate: Date? = nil,
         emojiReaction: String? = nil,
-        emojiReactionNotAllowedReason: EmojiReactionNotAllowedReason? = nil
+        emojiReactionNotAllowedReason: EmojiReactionNotAllowedReason? = nil,
+        acknowledge: String? = nil
     ) {
         self.init()
 
@@ -540,6 +565,7 @@ public final class Message: Object, Decodable, ObjectKeyIdentifiable {
         self.snoozeEndDate = snoozeEndDate
         self.emojiReaction = emojiReaction
         self.emojiReactionNotAllowedReason = emojiReactionNotAllowedReason
+        self.acknowledge = acknowledge
     }
 
     public func toThread() -> Thread {
diff --git a/MailCore/Models/MessageBanner.swift b/MailCore/Models/MessageBanner.swift
index cc815029ba..86f631d907 100644
--- a/MailCore/Models/MessageBanner.swift
+++ b/MailCore/Models/MessageBanner.swift
@@ -28,6 +28,7 @@ public enum MessageBanner: Equatable, Identifiable, Hashable {
     case displayContent
     case encrypted
     case unsubscribeLink
+    case acknowledge
 
     public static func == (lhs: MessageBanner, rhs: MessageBanner) -> Bool {
         switch (lhs, rhs) {
@@ -41,6 +42,8 @@ public enum MessageBanner: Equatable, Identifiable, Hashable {
             return true
         case (.unsubscribeLink, .unsubscribeLink):
             return true
+        case (.acknowledge, .acknowledge):
+            return true
         default:
             return false
         }
@@ -58,6 +61,8 @@ public extension [MessageBanner] {
             return !contains(.encrypted)
         case .unsubscribeLink:
             return true
+        case .acknowledge:
+            return true
         default:
             return false
         }
diff --git a/MailCoreUI/Helpers/PreviewHelper.swift b/MailCoreUI/Helpers/PreviewHelper.swift
index 4b20804153..4f370434db 100644
--- a/MailCoreUI/Helpers/PreviewHelper.swift
+++ b/MailCoreUI/Helpers/PreviewHelper.swift
@@ -123,7 +123,8 @@ public enum PreviewHelper {
                                               scheduled: false,
                                               forwarded: false,
                                               flagged: false,
-                                              hasUnsubscribeLink: true)
+                                              hasUnsubscribeLink: true,
+                                              acknowledge: "pending")
 
     public static let sampleMessages = Array(
         repeating: PreviewHelper.sampleMessage,
diff --git a/MailResources/Localizable/de.lproj/Localizable.strings b/MailResources/Localizable/de.lproj/Localizable.strings
index d78190f185..e1c906bc8f 100644
--- a/MailResources/Localizable/de.lproj/Localizable.strings
+++ b/MailResources/Localizable/de.lproj/Localizable.strings
@@ -16,6 +16,12 @@
 /* loco:642179d9733cd4523d03dcf2 */
 "accentColorSystemTitle" = "Farbe des Systems";
 
+/* loco:6936f775de93800154038b75 */
+"acknowledgementMessage" = "Der Absender hat eine Lesebestätigung angefordert.";
+
+/* loco:6936f7e6835ef86e27063eb6 */
+"acknowledgementMessageSent" = "Es wurde eine Lesebestätigung an den Absender gesendet.";
+
 /* loco:629f0e2244ac887a51141312 */
 "actionArchive" = "Archiv";
 
@@ -1360,6 +1366,9 @@
 /* loco:62ac871d2502053d7b0cbb32 */
 "send" = "Senden Sie";
 
+/* loco:6936f6d2c3bd045a2001d752 */
+"sendConfirmationAction" = "Senden Sie die Bestätigung";
+
 /* loco:627e401ec1c7c02de9181292 */
 "sentFolder" = "Gesendete Nachrichten";
 
@@ -1627,6 +1636,12 @@
 /* loco:652fd443ec75b05b000d43f2 */
 "snackBarAccountDeleted" = "Gelöschtes Konto";
 
+/* loco:6937d843b9fb15c2510859d2 */
+"snackbarAcknowledgementFailure" = "Senden fehlgeschlagen";
+
+/* loco:6937d715da67a52ff201eed2 */
+"snackbarAcknowledgementSuccess" = "Lesebestätigung gesendet";
+
 /* loco:63f3961e7c16fb607809d632 */
 "snackbarBlockUserConfirmation" = "Absender ist jetzt blockiert";
 
diff --git a/MailResources/Localizable/en.lproj/Localizable.strings b/MailResources/Localizable/en.lproj/Localizable.strings
index ad3a82384d..8d91677252 100644
--- a/MailResources/Localizable/en.lproj/Localizable.strings
+++ b/MailResources/Localizable/en.lproj/Localizable.strings
@@ -16,6 +16,12 @@
 /* loco:642179d9733cd4523d03dcf2 */
 "accentColorSystemTitle" = "System color";
 
+/* loco:6936f775de93800154038b75 */
+"acknowledgementMessage" = "The sender requested a read receipt.";
+
+/* loco:6936f7e6835ef86e27063eb6 */
+"acknowledgementMessageSent" = "A read receipt has been sent to the sender.";
+
 /* loco:629f0e2244ac887a51141312 */
 "actionArchive" = "Archive";
 
@@ -1360,6 +1366,9 @@
 /* loco:62ac871d2502053d7b0cbb32 */
 "send" = "Send";
 
+/* loco:6936f6d2c3bd045a2001d752 */
+"sendConfirmationAction" = "Send the confirmation";
+
 /* loco:627e401ec1c7c02de9181292 */
 "sentFolder" = "Sent messages";
 
@@ -1627,6 +1636,12 @@
 /* loco:652fd443ec75b05b000d43f2 */
 "snackBarAccountDeleted" = "Account deleted";
 
+/* loco:6937d843b9fb15c2510859d2 */
+"snackbarAcknowledgementFailure" = "Failed to send";
+
+/* loco:6937d715da67a52ff201eed2 */
+"snackbarAcknowledgementSuccess" = "Read receipt sent";
+
 /* loco:63f3961e7c16fb607809d632 */
 "snackbarBlockUserConfirmation" = "Sender is now blocked";
 
diff --git a/MailResources/Localizable/es.lproj/Localizable.strings b/MailResources/Localizable/es.lproj/Localizable.strings
index 856ea94f97..02d91bfe1f 100644
--- a/MailResources/Localizable/es.lproj/Localizable.strings
+++ b/MailResources/Localizable/es.lproj/Localizable.strings
@@ -16,6 +16,12 @@
 /* loco:642179d9733cd4523d03dcf2 */
 "accentColorSystemTitle" = "Color del sistema";
 
+/* loco:6936f775de93800154038b75 */
+"acknowledgementMessage" = "El remitente ha solicitado una confirmación de lectura.";
+
+/* loco:6936f7e6835ef86e27063eb6 */
+"acknowledgementMessageSent" = "Se ha enviado una confirmación de lectura al remitente.";
+
 /* loco:629f0e2244ac887a51141312 */
 "actionArchive" = "Archivo";
 
@@ -1357,6 +1363,9 @@
 /* loco:62ac871d2502053d7b0cbb32 */
 "send" = "Enviar";
 
+/* loco:6936f6d2c3bd045a2001d752 */
+"sendConfirmationAction" = "Enviar la confirmación";
+
 /* loco:627e401ec1c7c02de9181292 */
 "sentFolder" = "Mensajes enviados";
 
@@ -1624,6 +1633,12 @@
 /* loco:652fd443ec75b05b000d43f2 */
 "snackBarAccountDeleted" = "Cuenta eliminada";
 
+/* loco:6937d843b9fb15c2510859d2 */
+"snackbarAcknowledgementFailure" = "Error al enviar";
+
+/* loco:6937d715da67a52ff201eed2 */
+"snackbarAcknowledgementSuccess" = "Recibo de lectura enviado";
+
 /* loco:63f3961e7c16fb607809d632 */
 "snackbarBlockUserConfirmation" = "El remitente está bloqueado";
 
diff --git a/MailResources/Localizable/fr.lproj/Localizable.strings b/MailResources/Localizable/fr.lproj/Localizable.strings
index 64bf8fa913..ea4364d02c 100644
--- a/MailResources/Localizable/fr.lproj/Localizable.strings
+++ b/MailResources/Localizable/fr.lproj/Localizable.strings
@@ -16,6 +16,12 @@
 /* loco:642179d9733cd4523d03dcf2 */
 "accentColorSystemTitle" = "Couleur du système";
 
+/* loco:6936f775de93800154038b75 */
+"acknowledgementMessage" = "L’expéditeur a demandé une confirmation de lecture.";
+
+/* loco:6936f7e6835ef86e27063eb6 */
+"acknowledgementMessageSent" = "Une confirmation de lecture a été envoyée à l’expéditeur.";
+
 /* loco:629f0e2244ac887a51141312 */
 "actionArchive" = "Archiver";
 
@@ -1360,6 +1366,9 @@
 /* loco:62ac871d2502053d7b0cbb32 */
 "send" = "Envoyer";
 
+/* loco:6936f6d2c3bd045a2001d752 */
+"sendConfirmationAction" = "Envoyer la confirmation";
+
 /* loco:627e401ec1c7c02de9181292 */
 "sentFolder" = "Messages envoyés";
 
@@ -1627,6 +1636,12 @@
 /* loco:652fd443ec75b05b000d43f2 */
 "snackBarAccountDeleted" = "Compte supprimé";
 
+/* loco:6937d843b9fb15c2510859d2 */
+"snackbarAcknowledgementFailure" = "Échec de l’envoi";
+
+/* loco:6937d715da67a52ff201eed2 */
+"snackbarAcknowledgementSuccess" = "Accusé de lecture envoyé";
+
 /* loco:63f3961e7c16fb607809d632 */
 "snackbarBlockUserConfirmation" = "L’expéditeur est maintenant bloqué";
 
diff --git a/MailResources/Localizable/it.lproj/Localizable.strings b/MailResources/Localizable/it.lproj/Localizable.strings
index 6b42d2eb34..5a0f89fac7 100644
--- a/MailResources/Localizable/it.lproj/Localizable.strings
+++ b/MailResources/Localizable/it.lproj/Localizable.strings
@@ -16,6 +16,12 @@
 /* loco:642179d9733cd4523d03dcf2 */
 "accentColorSystemTitle" = "Colore del sistema";
 
+/* loco:6936f775de93800154038b75 */
+"acknowledgementMessage" = "Il mittente ha richiesto una ricevuta di lettura.";
+
+/* loco:6936f7e6835ef86e27063eb6 */
+"acknowledgementMessageSent" = "È stata inviata una ricevuta di lettura al mittente.";
+
 /* loco:629f0e2244ac887a51141312 */
 "actionArchive" = "Archivia";
 
@@ -1360,6 +1366,9 @@
 /* loco:62ac871d2502053d7b0cbb32 */
 "send" = "Invia";
 
+/* loco:6936f6d2c3bd045a2001d752 */
+"sendConfirmationAction" = "Inviare la conferma";
+
 /* loco:627e401ec1c7c02de9181292 */
 "sentFolder" = "Messaggi inviati";
 
@@ -1627,6 +1636,12 @@
 /* loco:652fd443ec75b05b000d43f2 */
 "snackBarAccountDeleted" = "Account cancellato";
 
+/* loco:6937d843b9fb15c2510859d2 */
+"snackbarAcknowledgementFailure" = "Invio non riuscito";
+
+/* loco:6937d715da67a52ff201eed2 */
+"snackbarAcknowledgementSuccess" = "Ricevuta di lettura inviata";
+
 /* loco:63f3961e7c16fb607809d632 */
 "snackbarBlockUserConfirmation" = "Il mittente è ora bloccato";