MathWallet5 has supported Solana Name Service (.sol)
Here is how to use these names in MathWallet5
When you open the transfer UI, enter the target domain name in the address field, and MathWallet will resolve that name.
You will see which name system it is, and click the name system button to double check the target address
Solana Name Service is built by Bonfida
If you’d like to get your own .sol name, you can open mathdapp.store, search ‘Solana Name Service’ and start the bid process for you name selection.