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Getting Started With Avalanche And .avax Domain Names

Mailchain users can use their Avalanche C-Chain wallet addresses and .avax names to send and receive messages. It’s simple to get started…


Avalanche® is an open-source platform for launching decentralized finance applications and enterprise blockchain deployments in one interoperable, highly scalable ecosystem. Everything on Avalanche is a Subnet, and every chain is part of a Subnet. Validators are required to be a member of the Primary Network; all other Subnets are optional. The Primary Network contains three blockchains: Platform Chain (P-Chain), Contract Chain (C-Chain), Exchange Chain (X-Chain). Source:

.avax domain names are provided by Avvy Domains, a naming service designed to support the Avalanche ecosystem and its various subnets. — Source: Avvy Domains

How To Add Your Avalanche Address or .avax Domain Name To Mailchain


  • (Optional) You have an .avax name, registered through Avvy Domains, configured to resolve to your address (see here)
  • You have a Mailchain account (see here)

Step 1: Connect your wallet

Follow these steps to connect and register an existing blockchain wallet address:

  1. Once you have signed into Mailchain, head to your Inbox (

  2. Click 'Register your wallet'

    register a wallet
  3. Select a wallet provider which supports the wallet address you are registering (e.g. Metamask for Ethereum and all other EVM addresses)

    select your wallet provider
  4. Click 'Connect'

    connect your wallet
  5. Select the address you would like to register, then click 'Next'

    select the wallet address to register
  6. Click 'Connect' to confirm Mailchain should be able to read your address

    click connect button

Your wallet is now connected.

Step 2: Verify your address

  1. You can now register your wallet address with Mailchain. To do this click 'Verify Address'.

    advanced option

    By default, Mailchain is able to receive messages for your existing blockchain wallet address before you sign up. If you do not wish to retrieve these messages, un-check the option to 'Retrieve messages sent to my address prior to registering'.

    verify address
  2. A 'Signature Request' will appear in your wallet. It contains the following text:

    Welcome to Mailchain!

    Please sign to start using this address with Mailchain. This will not trigger a blockchain transaction or cost any gas fees.

    What's happening?
    A messaging key will be registered with this address and used only for messaging. It will replace any existing registered messaging keys.

    Technical Details:
    Address: your_address
    Messaging key: a_generated_messaging_key
    Nonce: a_number

    Review the request

  3. Click 'Sign'

    review signature, then sign message

Your wallet is now verified.

Step 3: Adding your .avax domain name

  1. The next step checks for any supported Web3 domain names that resolve to your wallet address, including .avax names (Avvy domains for Avalanche).

    checking for name services

    The example below found epistola.avax

    decentralized identity found

    Manual search for a web3 domain

    If your name is not automatically found, you can manually search for it using the search box.

    manually searching for supported names

    If your name still cannot be resolved, please see Avalanche FAQs for troubleshooting tips.

  2. Click 'Apply' to save your changes.

    apply customization

Step 4: Disconnect your wallet

  1. Click 'Disconnect' to disconnect your wallet from Mailchain.

    click disconnect button

    You have successfully registered your wallet address with a set of messaging keys that belong to your Mailchain account. You no longer need to have wallet connected to send and receive messages.

  2. You now have the option to 'Go To Inbox' or to 'Register Another Address'.

    choose Go To Inbox or Register Another Address

    You will see your new sub-inbox in the left sidebar.

    sub-inbox image

How To Send A Message From Your Avalanche Address or .avax Name

With Mailchain you can send Mailchain messages from your .avax name or C-Chain address to other Mailchain users.


  • You have a Mailchain account (see here)
  • (Optional) You have an .avax name, registered through Avvy Domains, configured to resolve to your address (see here)
  • (optional) You have added your .avax domain to Mailchain (see above)

Compose And Send A Message From Your .avax Name or Avalanche Address

  1. Log into your Mailchain account.

  2. Click 'Compose' in the sidebar.

  3. In the New Message window, click the “From” dropdown menu and select your C-Chain address or .avax name.

  4. Fill out the rest of the message, then click Send.

  5. Your message should be successfully sent.

Done! Your recipient will receive your message from your address or .avax name.