diff --git a/app/javascript/dashboard/i18n/locale/en/contact.json b/app/javascript/dashboard/i18n/locale/en/contact.json
index dd1af9e9e..b0f4eb9ae 100644
--- a/app/javascript/dashboard/i18n/locale/en/contact.json
+++ b/app/javascript/dashboard/i18n/locale/en/contact.json
@@ -155,6 +155,11 @@
         "LABEL": "Inbox",
         "ERROR": "Select an inbox"
       },
+      "SUBJECT": {
+        "LABEL": "Subject",
+        "PLACEHOLDER": "Subject",
+        "ERROR": "Subject can't be empty"
+      },
       "MESSAGE": {
         "LABEL": "Message",
         "PLACEHOLDER": "Write your message here",
diff --git a/app/javascript/dashboard/routes/dashboard/conversation/contact/ConversationForm.vue b/app/javascript/dashboard/routes/dashboard/conversation/contact/ConversationForm.vue
index 75e333a73..22acd84e5 100644
--- a/app/javascript/dashboard/routes/dashboard/conversation/contact/ConversationForm.vue
+++ b/app/javascript/dashboard/routes/dashboard/conversation/contact/ConversationForm.vue
@@ -41,6 +41,22 @@
           </label>
         </div>
       </div>
+      <div class="row" v-if="isAnEmailInbox">
+        <div class="columns">
+          <label :class="{ error: $v.message.$error }">
+            {{ $t('NEW_CONVERSATION.FORM.SUBJECT.LABEL') }}
+            <input
+              v-model="subject"
+              type="text"
+              :placeholder="$t('NEW_CONVERSATION.FORM.SUBJECT.PLACEHOLDER')"
+              @input="$v.message.$touch"
+            />
+            <span v-if="$v.message.$error" class="message">
+              {{ $t('NEW_CONVERSATION.FORM.SUBJECT.ERROR') }}
+            </span>
+          </label>
+        </div>
+      </div>
       <div class="row">
         <div class="columns">
           <label :class="{ error: $v.message.$error }">
@@ -75,6 +91,7 @@ import { mapGetters } from 'vuex';
 import Thumbnail from 'dashboard/components/widgets/Thumbnail';
 
 import alertMixin from 'shared/mixins/alertMixin';
+import { INBOX_TYPES } from 'shared/mixins/inboxMixin';
 import { ExceptionWithMessage } from 'shared/helpers/CustomErrors';
 import { required } from 'vuelidate/lib/validators';
 
@@ -96,11 +113,15 @@ export default {
   data() {
     return {
       name: '',
+      subject: '',
       message: '',
       selectedInbox: '',
     };
   },
   validations: {
+    subject: {
+      required,
+    },
     message: {
       required,
     },
@@ -119,6 +140,7 @@ export default {
         sourceId: this.targetInbox.source_id,
         contactId: this.contact.id,
         message: { content: this.message },
+        mailSubject: this.subject,
       };
     },
     targetInbox: {
@@ -138,6 +160,12 @@ export default {
     inboxes() {
       return this.contact.contactableInboxes || [];
     },
+    isAnEmailInbox() {
+      return (
+        this.selectedInbox &&
+        this.selectedInbox.inbox.channel_type === INBOX_TYPES.EMAIL
+      );
+    },
   },
   methods: {
     onCancel() {
@@ -154,7 +182,6 @@ export default {
       }
       try {
         const payload = this.getNewConversation;
-
         await this.onSubmit(payload);
         this.onSuccess();
         this.showAlert(this.$t('NEW_CONVERSATION.FORM.SUCCESS_MESSAGE'));
diff --git a/app/javascript/dashboard/store/modules/contactConversations.js b/app/javascript/dashboard/store/modules/contactConversations.js
index eefae3165..3c3280721 100644
--- a/app/javascript/dashboard/store/modules/contactConversations.js
+++ b/app/javascript/dashboard/store/modules/contactConversations.js
@@ -24,12 +24,15 @@ export const actions = {
     commit(types.default.SET_CONTACT_CONVERSATIONS_UI_FLAG, {
       isCreating: true,
     });
-    const { inboxId, message, contactId, sourceId } = params;
+    const { inboxId, message, contactId, sourceId, mailSubject } = params;
     try {
       const { data } = await ConversationApi.create({
         inbox_id: inboxId,
         contact_id: contactId,
         source_id: sourceId,
+        additional_attributes: {
+          mail_subject: mailSubject,
+        },
         message,
       });
       commit(types.default.ADD_CONTACT_CONVERSATION, {
diff --git a/app/javascript/dashboard/store/modules/specs/contactConversations/actions.spec.js b/app/javascript/dashboard/store/modules/specs/contactConversations/actions.spec.js
index 1daaba977..3846d4aa7 100644
--- a/app/javascript/dashboard/store/modules/specs/contactConversations/actions.spec.js
+++ b/app/javascript/dashboard/store/modules/specs/contactConversations/actions.spec.js
@@ -44,7 +44,13 @@ describe('#actions', () => {
       axios.post.mockResolvedValue({ data: conversationList[0] });
       await actions.create(
         { commit },
-        { inboxId: 1, message: { content: 'hi' }, contactId: 4, sourceId: 5 }
+        {
+          inboxId: 1,
+          message: { content: 'hi' },
+          contactId: 4,
+          sourceId: 5,
+          mailSubject: 'Mail Subject',
+        }
       );
       expect(commit.mock.calls).toEqual([
         [types.default.SET_CONTACT_CONVERSATIONS_UI_FLAG, { isCreating: true }],
@@ -65,7 +71,13 @@ describe('#actions', () => {
       await expect(
         actions.create(
           { commit },
-          { inboxId: 1, message: { content: 'hi' }, contactId: 4, sourceId: 5 }
+          {
+            inboxId: 1,
+            message: { content: 'hi' },
+            contactId: 4,
+            sourceId: 5,
+            mailSubject: 'Mail Subject',
+          }
         )
       ).rejects.toThrow(Error);
       expect(commit.mock.calls).toEqual([
diff --git a/app/mailers/conversation_reply_mailer.rb b/app/mailers/conversation_reply_mailer.rb
index a36450ec7..5d4770bd7 100644
--- a/app/mailers/conversation_reply_mailer.rb
+++ b/app/mailers/conversation_reply_mailer.rb
@@ -12,7 +12,6 @@ class ConversationReplyMailer < ApplicationMailer
     new_messages = @conversation.messages.chat.where('id >= ?', last_queued_id)
     @messages = recap_messages + new_messages
     @messages = @messages.select(&:email_reply_summarizable?)
-
     mail({
            to: @contact&.email,
            from: from_email_with_name,
@@ -110,14 +109,15 @@ class ConversationReplyMailer < ApplicationMailer
   end
 
   def mail_subject
-    return "Re: #{incoming_mail_subject}" if incoming_mail_subject
+    subject = @conversation.additional_attributes['mail_subject']
+    return "[##{@conversation.display_id}] #{I18n.t('conversations.reply.email_subject')}" if subject.nil?
 
-    subject_line = I18n.t('conversations.reply.email_subject')
-    "[##{@conversation.display_id}] #{subject_line}"
-  end
-
-  def incoming_mail_subject
-    @incoming_mail_subject ||= @conversation.additional_attributes['mail_subject']
+    chat_count = @conversation.messages.chat.count
+    if chat_count > 1
+      "Re: #{subject}"
+    else
+      subject
+    end
   end
 
   def reply_email
diff --git a/spec/mailers/conversation_reply_mailer_spec.rb b/spec/mailers/conversation_reply_mailer_spec.rb
index c89509785..eb9799ddf 100644
--- a/spec/mailers/conversation_reply_mailer_spec.rb
+++ b/spec/mailers/conversation_reply_mailer_spec.rb
@@ -25,6 +25,15 @@ RSpec.describe ConversationReplyMailer, type: :mailer do
                  bcc_emails: 'agent_bcc1@example.com'
                })
       end
+      let(:new_message) do
+        create(:message,
+               account: account,
+               conversation: conversation,
+               content_attributes: {
+                 cc_emails: 'agent_cc2@example.com',
+                 bcc_emails: 'agent_bcc2@example.com'
+               })
+      end
       let(:cc_message) do
         create(:message,
                account: account,
@@ -39,10 +48,17 @@ RSpec.describe ConversationReplyMailer, type: :mailer do
       let(:mail) { described_class.reply_with_summary(message.conversation, message.id).deliver_now }
       let(:cc_mail) { described_class.reply_with_summary(cc_message.conversation, message.id).deliver_now }
 
-      it 'renders the subject' do
+      it 'renders the default subject' do
         expect(mail.subject).to eq("[##{message.conversation.display_id}] New messages on this conversation")
       end
 
+      it 'renders the subject in conversation as reply' do
+        conversation.additional_attributes = { 'mail_subject': 'Mail Subject' }
+        conversation.save
+        new_message.save
+        expect(mail.subject).to eq('Re: Mail Subject')
+      end
+
       it 'not have private notes' do
         # make the message private
         private_message.private = true
@@ -91,10 +107,16 @@ RSpec.describe ConversationReplyMailer, type: :mailer do
         message_2.save
       end
 
-      it 'renders the subject' do
+      it 'renders the default subject' do
         expect(mail.subject).to eq("[##{message_2.conversation.display_id}] New messages on this conversation")
       end
 
+      it 'renders the subject in conversation' do
+        conversation.additional_attributes = { 'mail_subject': 'Mail Subject' }
+        conversation.save
+        expect(mail.subject).to eq('Mail Subject')
+      end
+
       it 'not have private notes' do
         # make the message private
         private_message.private = true