diff --git a/src/components/MessageComposer.vue b/src/components/MessageComposer.vue
index c92e1e8..238b922 100644
--- a/src/components/MessageComposer.vue
+++ b/src/components/MessageComposer.vue
@@ -12,6 +12,7 @@ import type { CollectionObject, MessageAddressObject } from '@MailManager/models
 import { useMailOperationsStore } from '@/stores/mailOperationsStore'
 import { useMailCompositionStore } from '@/stores/mailCompositionStore'
 import { ComposerMode } from '@/types/composer'
+import type { ComposerFormat } from '@/types/composer'
 import { documentsSelectorComponent } from '@/services/documentsSelector'
 import ComposerToolbar from '@/components/composer/ComposerToolbar.vue'
 import ComposerSender from '@/components/composer/ComposerSender.vue'
@@ -48,6 +49,8 @@ const {
 // State
 const showCc = ref(false)
 const showBcc = ref(false)
+const format = ref<ComposerFormat>('rich')
+const textEdited = ref(false)
 const applyingDraftToEditor = ref(false)
 const showDocumentSelector = ref(false)
 const showCloseDialog = ref(false)
@@ -85,6 +88,14 @@ const subject = computed({
 
 const attachments = computed(() => activeDraft.value?.attachments ?? {})
 
+const text = computed({
+  get: () => activeDraft.value?.message.body.text ?? '',
+  set: value => {
+    textEdited.value = true
+    compositionStore.updateBody({ text: value, html: textToHtml(value) })
+  },
+})
+
 // Initialize Tiptap editor
 const editor = useEditor({
   extensions: [
@@ -118,6 +129,8 @@ watch(
     compositionStore.openDraft(props.mode, props.source)
     showCc.value = (activeDraft.value?.message.cc.length ?? 0) > 0
     showBcc.value = (activeDraft.value?.message.bcc.length ?? 0) > 0
+    format.value = 'rich'
+    textEdited.value = false
 
     applyingDraftToEditor.value = true
     currentEditor.commands.setContent(activeDraft.value?.message.body.html || '')
@@ -249,6 +262,42 @@ const toggleLink = () => {
 const isActive = (name: string, attrs?: any) => {
   return editor.value?.isActive(name, attrs) || false
 }
+
+const toggleFormat = () => {
+  if (format.value === 'rich') {
+    if (editor.value) {
+      compositionStore.updateBody({
+        html: activeDraft.value?.message.body.html ?? '',
+        text: editor.value.getText(),
+      })
+    }
+    textEdited.value = false
+    format.value = 'plain'
+    return
+  }
+
+  format.value = 'rich'
+  if (textEdited.value && editor.value) {
+    applyingDraftToEditor.value = true
+    editor.value.commands.setContent(activeDraft.value?.message.body.html || '')
+    applyingDraftToEditor.value = false
+  }
+}
+
+function textToHtml(text: string): string {
+  if (!text) {
+    return ''
+  }
+
+  return text
+    .split(/\r?\n/)
+    .map(line => `<p>${escapeHtml(line) || '<br>'}</p>`)
+    .join('')
+}
+
+function escapeHtml(value: string): string {
+  return value.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
+}
 </script>
 
 <template>
@@ -297,6 +346,8 @@ const isActive = (name: string, attrs?: any) => {
 
       <ComposerEditor
         :editor="editor"
+        :format="format"
+        :text="text"
         :is-bold-active="isActive('bold')"
         :is-italic-active="isActive('italic')"
         :is-underline-active="isActive('underline')"
@@ -309,6 +360,8 @@ const isActive = (name: string, attrs?: any) => {
         @bullet-list="toggleBulletList"
         @ordered-list="toggleOrderedList"
         @link="toggleLink"
+        @toggle-format="toggleFormat"
+        @update:text="text = $event"
         @attach-from-device="handleAttachFromDevice"
         @attach-from-documents="handleAttachFromDocuments"
       />
diff --git a/src/components/composer/ComposerEditor.vue b/src/components/composer/ComposerEditor.vue
index 6a621a1..8738e09 100644
--- a/src/components/composer/ComposerEditor.vue
+++ b/src/components/composer/ComposerEditor.vue
@@ -9,6 +9,14 @@ defineProps({
     type: Object as PropType<Editor | null>,
     default: null,
   },
+  format: {
+    type: String as PropType<'rich' | 'plain'>,
+    required: true,
+  },
+  text: {
+    type: String,
+    default: '',
+  },
   isBoldActive: {
     type: Boolean,
     required: true,
@@ -42,6 +50,8 @@ const emit = defineEmits<{
   bulletList: []
   orderedList: []
   link: []
+  toggleFormat: []
+  'update:text': [value: string]
   attachFromDevice: [files: File[]]
   attachFromDocuments: []
 }>()
@@ -66,68 +76,84 @@ function handleFileChange(event: Event) {
 
 <template>
   <v-toolbar density="compact" elevation="0" class="editor-toolbar">
-    <v-btn
-      icon
-      size="small"
-      :class="{ 'v-btn--active': isBoldActive }"
-      @click="$emit('bold')"
-    >
-      <v-icon>mdi-format-bold</v-icon>
-      <v-tooltip activator="parent" location="bottom">Bold</v-tooltip>
-    </v-btn>
+    <template v-if="format === 'rich'">
+      <v-btn
+        icon
+        size="small"
+        :class="{ 'v-btn--active': isBoldActive }"
+        @click="$emit('bold')"
+      >
+        <v-icon>mdi-format-bold</v-icon>
+        <v-tooltip activator="parent" location="bottom">Bold</v-tooltip>
+      </v-btn>
+
+      <v-btn
+        icon
+        size="small"
+        :class="{ 'v-btn--active': isItalicActive }"
+        @click="$emit('italic')"
+      >
+        <v-icon>mdi-format-italic</v-icon>
+        <v-tooltip activator="parent" location="bottom">Italic</v-tooltip>
+      </v-btn>
+
+      <v-btn
+        icon
+        size="small"
+        :class="{ 'v-btn--active': isUnderlineActive }"
+        @click="$emit('underline')"
+      >
+        <v-icon>mdi-format-underline</v-icon>
+        <v-tooltip activator="parent" location="bottom">Underline</v-tooltip>
+      </v-btn>
+
+      <v-divider vertical class="mx-2" />
+
+      <v-btn
+        icon
+        size="small"
+        :class="{ 'v-btn--active': isBulletListActive }"
+        @click="$emit('bulletList')"
+      >
+        <v-icon>mdi-format-list-bulleted</v-icon>
+        <v-tooltip activator="parent" location="bottom">Bullet List</v-tooltip>
+      </v-btn>
+
+      <v-btn
+        icon
+        size="small"
+        :class="{ 'v-btn--active': isOrderedListActive }"
+        @click="$emit('orderedList')"
+      >
+        <v-icon>mdi-format-list-numbered</v-icon>
+        <v-tooltip activator="parent" location="bottom">Numbered List</v-tooltip>
+      </v-btn>
+
+      <v-divider vertical class="mx-2" />
+
+      <v-btn
+        icon
+        size="small"
+        :class="{ 'v-btn--active': isLinkActive }"
+        @click="$emit('link')"
+      >
+        <v-icon>mdi-link</v-icon>
+        <v-tooltip activator="parent" location="bottom">Link</v-tooltip>
+      </v-btn>
+
+      <v-divider vertical class="mx-2" />
+    </template>
 
     <v-btn
       icon
       size="small"
-      :class="{ 'v-btn--active': isItalicActive }"
-      @click="$emit('italic')"
+      :class="{ 'v-btn--active': format === 'plain' }"
+      @click="$emit('toggleFormat')"
     >
-      <v-icon>mdi-format-italic</v-icon>
-      <v-tooltip activator="parent" location="bottom">Italic</v-tooltip>
-    </v-btn>
-
-    <v-btn
-      icon
-      size="small"
-      :class="{ 'v-btn--active': isUnderlineActive }"
-      @click="$emit('underline')"
-    >
-      <v-icon>mdi-format-underline</v-icon>
-      <v-tooltip activator="parent" location="bottom">Underline</v-tooltip>
-    </v-btn>
-
-    <v-divider vertical class="mx-2" />
-
-    <v-btn
-      icon
-      size="small"
-      :class="{ 'v-btn--active': isBulletListActive }"
-      @click="$emit('bulletList')"
-    >
-      <v-icon>mdi-format-list-bulleted</v-icon>
-      <v-tooltip activator="parent" location="bottom">Bullet List</v-tooltip>
-    </v-btn>
-
-    <v-btn
-      icon
-      size="small"
-      :class="{ 'v-btn--active': isOrderedListActive }"
-      @click="$emit('orderedList')"
-    >
-      <v-icon>mdi-format-list-numbered</v-icon>
-      <v-tooltip activator="parent" location="bottom">Numbered List</v-tooltip>
-    </v-btn>
-
-    <v-divider vertical class="mx-2" />
-
-    <v-btn
-      icon
-      size="small"
-      :class="{ 'v-btn--active': isLinkActive }"
-      @click="$emit('link')"
-    >
-      <v-icon>mdi-link</v-icon>
-      <v-tooltip activator="parent" location="bottom">Link</v-tooltip>
+      <v-icon>{{ format === 'plain' ? 'mdi-format-text' : 'mdi-code-tags' }}</v-icon>
+      <v-tooltip activator="parent" location="bottom">
+        {{ format === 'plain' ? 'Rich Text' : 'Plain Text' }}
+      </v-tooltip>
     </v-btn>
 
     <v-spacer />
@@ -154,7 +180,17 @@ function handleFileChange(event: Event) {
   <v-divider />
 
   <div class="editor-container">
-    <EditorContent :editor="editor ?? undefined" />
+    <EditorContent v-if="format === 'rich'" :editor="editor ?? undefined" />
+    <v-textarea
+      v-else
+      :model-value="text"
+      variant="plain"
+      auto-grow
+      hide-details
+      placeholder="Write your message..."
+      class="text-editor pa-4"
+      @update:model-value="$emit('update:text', $event)"
+    />
   </div>
 </template>
 
@@ -179,6 +215,11 @@ function handleFileChange(event: Event) {
   color: rgb(var(--v-theme-primary));
 }
 
+.text-editor :deep(textarea) {
+  min-height: 300px;
+  font-family: inherit;
+}
+
 :deep(.tiptap-editor) {
   outline: none;
   min-height: 300px;
diff --git a/src/types/composer.ts b/src/types/composer.ts
index 8df36e4..67ae6aa 100644
--- a/src/types/composer.ts
+++ b/src/types/composer.ts
@@ -9,6 +9,9 @@ export enum ComposerMode {
   Forward = 'forward',
 }
 
+/** Body editing format: rich (Tiptap/HTML) or plain text. */
+export type ComposerFormat = 'rich' | 'plain'
+
 export interface ComposerDraftAttachment {
   identifier: string
   composition: string