TempMail Hub
@tempmail_hub_botTemporary email inside Telegram: create a disposable address and get emails and confirmation codes right in the chat. No sign-up, inbox lives up to 7 days. Same inbox is also available on the web at tempmailhub.net.
Your personal address book on Telegram for saving telegram users and bots just by username. I'm MyAddressBookBot and i'm your personal address book on Telegram. You can use me to save and store users and bots by username. I'll make sure you would never lose contact with them by updating their username each day. All your contacts will be privately stored in a server and will never be shared.
— the badge on the card, faster publishing and a warning if the link stops working. How confirmation works