diff --git a/frontend/components/mail/MailLinkTaskModal.vue b/frontend/components/mail/MailLinkTaskModal.vue
new file mode 100644
index 0000000..78c2180
--- /dev/null
+++ b/frontend/components/mail/MailLinkTaskModal.vue
@@ -0,0 +1,266 @@
+<script setup lang="ts">
+import type { Task } from '~/services/dto/task'
+import type { Project } from '~/services/dto/project'
+import { useMailService } from '~/services/mail'
+import { useTaskService } from '~/services/tasks'
+import { useProjectService } from '~/services/projects'
+
+const props = defineProps<{
+    modelValue: boolean
+    /** ID BDD du message à lier */
+    messageId: number
+}>()
+
+const emit = defineEmits<{
+    'update:modelValue': [value: boolean]
+    /** Émis après liaison réussie — payload = id de la tâche liée */
+    linked: [taskId: number]
+}>()
+
+const { t } = useI18n()
+const mailService = useMailService()
+const taskService = useTaskService()
+const projectService = useProjectService()
+
+// ─── État recherche ───────────────────────────────────────────────────────
+
+const searchQuery = ref('')
+const filterProjectId = ref<number | null>(null)
+const results = ref<Task[]>([])
+const selectedTask = ref<Task | null>(null)
+const isLoading = ref(false)
+const isSubmitting = ref(false)
+
+// ─── Projets pour le filtre ───────────────────────────────────────────────
+
+const projects = ref<Project[]>([])
+
+const projectFilterOptions = computed(() =>
+    projects.value.map(p => ({ label: p.name, value: p.id })),
+)
+
+onMounted(async () => {
+    projects.value = await projectService.getAll({ archived: false })
+})
+
+// ─── Debounce recherche ───────────────────────────────────────────────────
+
+let debounceTimer: ReturnType<typeof setTimeout> | null = null
+
+watch([searchQuery, filterProjectId], () => {
+    selectedTask.value = null
+    if (debounceTimer) clearTimeout(debounceTimer)
+    debounceTimer = setTimeout(() => {
+        void runSearch()
+    }, 300)
+})
+
+async function runSearch(): Promise<void> {
+    const q = searchQuery.value.trim()
+    if (!q && !filterProjectId.value) {
+        results.value = []
+        return
+    }
+    isLoading.value = true
+    try {
+        const params: Record<string, string | number | boolean | string[]> = {
+            archived: false,
+        }
+        if (q) params['title'] = q
+        if (filterProjectId.value) params['project'] = `/api/projects/${filterProjectId.value}`
+        results.value = await taskService.getFiltered(params)
+    } finally {
+        isLoading.value = false
+    }
+}
+
+// ─── Reset à l'ouverture ──────────────────────────────────────────────────
+
+watch(() => props.modelValue, (open) => {
+    if (open) {
+        searchQuery.value = ''
+        filterProjectId.value = null
+        results.value = []
+        selectedTask.value = null
+    }
+})
+
+onBeforeUnmount(() => {
+    if (debounceTimer) clearTimeout(debounceTimer)
+})
+
+// ─── Actions ──────────────────────────────────────────────────────────────
+
+function close(): void {
+    emit('update:modelValue', false)
+}
+
+function selectTask(task: Task): void {
+    selectedTask.value = task
+}
+
+async function handleSubmit(): Promise<void> {
+    if (!selectedTask.value) return
+    isSubmitting.value = true
+    try {
+        await mailService.linkTask(props.messageId, selectedTask.value.id)
+        emit('linked', selectedTask.value.id)
+        close()
+    } finally {
+        isSubmitting.value = false
+    }
+}
+</script>
+
+<template>
+    <Teleport v-if="modelValue" to="body">
+        <Transition name="mail-modal" appear>
+            <div class="fixed inset-0 z-50 flex items-center justify-center p-4">
+                <div
+                    class="absolute inset-0 bg-slate-900/40 backdrop-blur-sm"
+                    @click="close"
+                />
+
+                <div
+                    class="relative z-10 w-full max-w-lg rounded-2xl bg-white shadow-2xl ring-1 ring-black/5 overflow-hidden"
+                    style="max-height: min(90vh, 640px)"
+                >
+                    <!-- Header -->
+                    <div class="flex items-center justify-between border-b border-neutral-100 bg-neutral-50/80 px-6 py-4">
+                        <h2 class="text-base font-bold text-neutral-900">
+                            {{ t('mail.linkTaskModal.title') }}
+                        </h2>
+                        <MalioButtonIcon
+                            icon="mdi:close"
+                            aria-label="Fermer"
+                            variant="ghost"
+                            icon-size="20"
+                            @click="close"
+                        />
+                    </div>
+
+                    <!-- Corps -->
+                    <div class="overflow-y-auto px-6 py-5 space-y-4">
+                        <!-- Filtre projet -->
+                        <MalioSelect
+                            v-model="filterProjectId"
+                            :options="projectFilterOptions"
+                            :label="t('mail.linkTaskModal.projectFilter')"
+                            :empty-option-label="t('mail.linkTaskModal.projectAll')"
+                            min-width="w-full"
+                        />
+
+                        <!-- Recherche tâche -->
+                        <div>
+                            <label class="mb-1 block text-sm font-medium text-neutral-700">
+                                {{ t('mail.linkTaskModal.title') }}
+                            </label>
+                            <input
+                                v-model="searchQuery"
+                                type="text"
+                                :placeholder="t('mail.linkTaskModal.searchPlaceholder')"
+                                class="w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-1 focus:ring-primary-500"
+                            />
+                        </div>
+
+                        <!-- Résultats -->
+                        <div class="max-h-64 overflow-y-auto rounded-md border border-neutral-200">
+                            <!-- Chargement -->
+                            <div
+                                v-if="isLoading"
+                                class="flex items-center justify-center py-6 text-sm text-neutral-400"
+                            >
+                                <Icon name="material-symbols:progress-activity" size="18" class="mr-2 animate-spin" />
+                                {{ t('mail.linkTaskModal.loading') }}
+                            </div>
+
+                            <!-- Vide -->
+                            <div
+                                v-else-if="!isLoading && results.length === 0 && (searchQuery.trim() || filterProjectId)"
+                                class="py-6 text-center text-sm text-neutral-400 italic"
+                            >
+                                {{ t('mail.linkTaskModal.empty') }}
+                            </div>
+
+                            <!-- Liste résultats -->
+                            <button
+                                v-for="task in results"
+                                :key="task.id"
+                                type="button"
+                                class="flex w-full items-start gap-3 px-4 py-3 text-left text-sm transition-colors hover:bg-neutral-50"
+                                :class="selectedTask?.id === task.id
+                                    ? 'bg-primary-50 border-l-2 border-primary-500'
+                                    : 'border-l-2 border-transparent'"
+                                @click="selectTask(task)"
+                            >
+                                <Icon
+                                    name="material-symbols:task-outline"
+                                    size="16"
+                                    class="mt-0.5 flex-shrink-0 text-neutral-400"
+                                />
+                                <div class="min-w-0 flex-1">
+                                    <p class="truncate font-medium text-neutral-800">
+                                        {{ task.title }}
+                                    </p>
+                                    <p
+                                        v-if="task.project"
+                                        class="truncate text-xs text-neutral-500"
+                                    >
+                                        {{ task.project.name }}
+                                        <span v-if="task.project.code && task.number">
+                                            — {{ task.project.code }}-{{ task.number }}
+                                        </span>
+                                    </p>
+                                </div>
+                                <Icon
+                                    v-if="selectedTask?.id === task.id"
+                                    name="material-symbols:check-circle"
+                                    size="16"
+                                    class="flex-shrink-0 text-primary-500"
+                                />
+                            </button>
+                        </div>
+                    </div>
+
+                    <!-- Footer -->
+                    <div class="flex justify-end gap-3 border-t border-neutral-100 px-6 py-4">
+                        <MalioButton
+                            variant="tertiary"
+                            label="Annuler"
+                            button-class="w-auto px-4"
+                            @click="close"
+                        />
+                        <MalioButton
+                            :label="t('mail.linkTaskModal.submit')"
+                            button-class="w-auto px-6"
+                            :disabled="!selectedTask || isSubmitting"
+                            @click="handleSubmit"
+                        />
+                    </div>
+                </div>
+            </div>
+        </Transition>
+    </Teleport>
+</template>
+
+<style scoped>
+.mail-modal-enter-active,
+.mail-modal-leave-active {
+    transition: opacity 0.2s ease;
+}
+
+.mail-modal-enter-active > div:last-child,
+.mail-modal-leave-active > div:last-child {
+    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
+}
+
+.mail-modal-enter-from,
+.mail-modal-leave-to {
+    opacity: 0;
+}
+
+.mail-modal-enter-from > div:last-child {
+    transform: scale(0.95) translateY(8px);
+    opacity: 0;
+}
+</style>