diff --git a/contact/pubspec.lock b/contact/pubspec.lock
index 3cde23d44..2315887ce 100644
--- a/contact/pubspec.lock
+++ b/contact/pubspec.lock
@@ -660,10 +660,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/email_recovery/pubspec.lock b/email_recovery/pubspec.lock
index 58043ced1..368b0e476 100644
--- a/email_recovery/pubspec.lock
+++ b/email_recovery/pubspec.lock
@@ -296,10 +296,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/fcm/pubspec.lock b/fcm/pubspec.lock
index d938da346..329ea1540 100644
--- a/fcm/pubspec.lock
+++ b/fcm/pubspec.lock
@@ -296,10 +296,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/forward/pubspec.lock b/forward/pubspec.lock
index d938da346..329ea1540 100644
--- a/forward/pubspec.lock
+++ b/forward/pubspec.lock
@@ -296,10 +296,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/lib/features/composer/presentation/composer_controller.dart b/lib/features/composer/presentation/composer_controller.dart
index 5777e1323..76c8e937d 100644
--- a/lib/features/composer/presentation/composer_controller.dart
+++ b/lib/features/composer/presentation/composer_controller.dart
@@ -496,6 +496,7 @@ class ComposerController extends BaseController
       bccRecipients: listBccEmailAddress.toSet(),
       replyToRecipients: listReplyToEmailAddress.toSet(),
       hasRequestReadReceipt: hasRequestReadReceipt.value,
+      isMarkAsImportant: isMarkAsImportant.value,
       identity: identitySelected.value,
       attachments: uploadController.attachmentsUploaded,
       inlineAttachments: uploadController.mapInlineAttachments,
@@ -1092,6 +1093,7 @@ class ComposerController extends BaseController
           bccRecipients: listBccEmailAddress.toSet(),
           replyToRecipients: listReplyToEmailAddress.toSet(),
           hasRequestReadReceipt: hasRequestReadReceipt.value,
+          isMarkAsImportant: isMarkAsImportant.value,
           identity: identitySelected.value,
           attachments: uploadController.attachmentsUploaded,
           inlineAttachments: uploadController.mapInlineAttachments,
@@ -2358,6 +2360,7 @@ class ComposerController extends BaseController
           bccRecipients: listBccEmailAddress.toSet(),
           replyToRecipients: listReplyToEmailAddress.toSet(),
           hasRequestReadReceipt: hasRequestReadReceipt.value,
+          isMarkAsImportant: isMarkAsImportant.value,
           identity: identitySelected.value,
           attachments: uploadController.attachmentsUploaded,
           inlineAttachments: uploadController.mapInlineAttachments,
diff --git a/lib/features/composer/presentation/extensions/create_email_request_extension.dart b/lib/features/composer/presentation/extensions/create_email_request_extension.dart
index 5f7cab24f..9bf6a9498 100644
--- a/lib/features/composer/presentation/extensions/create_email_request_extension.dart
+++ b/lib/features/composer/presentation/extensions/create_email_request_extension.dart
@@ -14,6 +14,7 @@ import 'package:model/mailbox/presentation_mailbox.dart';
 import 'package:tmail_ui_user/features/composer/domain/model/email_request.dart';
 import 'package:tmail_ui_user/features/composer/presentation/extensions/identity_extension.dart';
 import 'package:tmail_ui_user/features/composer/presentation/model/create_email_request.dart';
+import 'package:tmail_ui_user/features/composer/presentation/model/mail_priority_header.dart';
 import 'package:tmail_ui_user/features/email/domain/extensions/list_attachments_extension.dart';
 import 'package:tmail_ui_user/features/mailbox/domain/model/create_new_mailbox_request.dart';
 import 'package:tmail_ui_user/features/sending_queue/domain/extensions/sending_email_extension.dart';
@@ -156,7 +157,16 @@ extension CreateEmailRequestExtension on CreateEmailRequest {
         : null,
       identityHeader: withIdentityHeader
         ? {IndividualHeaderIdentifier.identityHeader: identity?.id?.id.value}
-        : null
+        : null,
+      xPriorityHeader: isMarkAsImportant
+        ? {IndividualHeaderIdentifier.xPriorityHeader: MailPriorityHeader.asImportant().xPriority}
+        : null,
+      importanceHeader: isMarkAsImportant
+        ? {IndividualHeaderIdentifier.importanceHeader: MailPriorityHeader.asImportant().importance}
+        : null,
+      priorityHeader: isMarkAsImportant
+        ? {IndividualHeaderIdentifier.priorityHeader: MailPriorityHeader.asImportant().priority}
+        : null,
     );
   }
 
diff --git a/lib/features/composer/presentation/model/create_email_request.dart b/lib/features/composer/presentation/model/create_email_request.dart
index 8b7a9a4bf..4ce4d9efb 100644
--- a/lib/features/composer/presentation/model/create_email_request.dart
+++ b/lib/features/composer/presentation/model/create_email_request.dart
@@ -19,6 +19,7 @@ class CreateEmailRequest with EquatableMixin {
   final String subject;
   final String emailContent;
   final bool hasRequestReadReceipt;
+  final bool isMarkAsImportant;
   final Set<EmailAddress>? fromSender;
   final Set<EmailAddress>? toRecipients;
   final Set<EmailAddress>? ccRecipients;
@@ -50,6 +51,7 @@ class CreateEmailRequest with EquatableMixin {
     this.bccRecipients,
     this.replyToRecipients,
     this.hasRequestReadReceipt = true,
+    this.isMarkAsImportant = false,
     this.identity,
     this.attachments,
     this.inlineAttachments,
@@ -79,6 +81,7 @@ class CreateEmailRequest with EquatableMixin {
     replyToRecipients,
     identity,
     hasRequestReadReceipt,
+    isMarkAsImportant,
     attachments,
     inlineAttachments,
     outboxMailboxId,
diff --git a/lib/features/composer/presentation/model/mail_priority_header.dart b/lib/features/composer/presentation/model/mail_priority_header.dart
new file mode 100644
index 000000000..518b8fbc0
--- /dev/null
+++ b/lib/features/composer/presentation/model/mail_priority_header.dart
@@ -0,0 +1,27 @@
+
+import 'package:equatable/equatable.dart';
+
+class MailPriorityHeader with EquatableMixin {
+  final String? xPriority;
+  final String? importance;
+  final String? priority;
+
+  MailPriorityHeader({
+    this.xPriority,
+    this.importance,
+    this.priority,
+  });
+
+  factory MailPriorityHeader.asImportant() => MailPriorityHeader(
+    xPriority: '1',
+    importance: 'high',
+    priority: 'urgent',
+  );
+
+  @override
+  List<Object?> get props => [
+    xPriority,
+    importance,
+    priority,
+  ];
+}
\ No newline at end of file
diff --git a/model/pubspec.lock b/model/pubspec.lock
index 6a29ea0c8..1439fd0c6 100644
--- a/model/pubspec.lock
+++ b/model/pubspec.lock
@@ -652,10 +652,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/pubspec.lock b/pubspec.lock
index ea172177e..4c9205acf 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1332,10 +1332,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/rule_filter/pubspec.lock b/rule_filter/pubspec.lock
index d938da346..329ea1540 100644
--- a/rule_filter/pubspec.lock
+++ b/rule_filter/pubspec.lock
@@ -296,10 +296,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description:
diff --git a/server_settings/pubspec.lock b/server_settings/pubspec.lock
index eed1c4084..eba1996bf 100644
--- a/server_settings/pubspec.lock
+++ b/server_settings/pubspec.lock
@@ -288,10 +288,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "278183b54ccfcda7396273c556609d28194e34f1"
+      resolved-ref: "00b8c073e9e8b6f1caa831c400a5c31e56424c08"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
-    version: "0.3.2"
+    version: "0.3.3"
   js:
     dependency: transitive
     description: