Fix: parse verification mail (#3864)

Email parsing logic was stripping of HTML tables which was causing the issue in this case.

Fixes: #3731

app/mailboxes/mailbox_helper.rb

@@ -5,7 +5,7 @@ module MailboxHelper
     @message = @conversation.messages.create(
       account_id: @conversation.account_id,
       sender: @conversation.contact,
-      content: processed_mail.text_content[:reply],
+      content: mail_content,
       inbox_id: @conversation.inbox_id,
       message_type: 'incoming',
       content_type: 'incoming_email',
@@ -48,4 +48,12 @@ module MailboxHelper
     # notification emails are send via mailer sender email address. so it should match
     @processed_mail.original_sender == Mail::Address.new(ENV.fetch('MAILER_SENDER_EMAIL', 'Chatwoot <accounts@chatwoot.com>')).address
   end
+
+  def mail_content
+    if processed_mail.text_content.present?
+      processed_mail.text_content[:reply]
+    elsif processed_mail.html_content.present?
+      processed_mail.html_content[:reply]
+    end
+  end
 end