1. First you have to register your .bit domain here :

https://app.did.id/explorer

- Select the username / name you want to use

- Prepare funds approximately $7 for registration

Here I use eth to pay for it, you can use others to make payments

- Wait a while after those 5 steps are complete

Congratulations you've registered your .bit

2. Convert your .bit into NFTS

• Sign and confirm with your wallet

- it takes about $6 more to convert to NFT

- Congratulations on successfully converting your .bit into NFT

• You can see it on your wallet in the NFT section or directly see it in opensea

3. Next let's register your mail3 using the .bit you already have

• Go To :

https://app.mail3.me/

- Connect wallet Sign and confirm using your wallet

- And congratulations you've joined mail3 using your .bit

Note: you can use your mail3 address or your .eth / .bit
You can change on setting

• You can replace it with what you like. Go to your profile in the top right corner - settings, choose what you want to use