title: Using Telegram to send personalized messages to any phone number
body: <p>I am looking at the Telegram API (Standard and BOT) to communicate to parents at a school. I had a look at both APIs. Is it true that one can only send to people in your Telegram associated contact list? With the BOT, will it be possible for users to register to the BOT and then I have their IDs to send messages to? I am working with a phone number as this is part of the database I have. I am a bit confused. Each message will be different so it is not a broadcast to all users but personalized with important information per parent. Perhaps Telegram is not the platform for this?</p>
  <p>Thanks!</p>
  <p>Jaco</p>