You don’t need any software or paid tools for this
First, you need a valid Gmail account: Preferably secondary gmails
# Then go to this site: https://gmail-anakan.com/
Generate many new mailboxes from your Gmail email. Email generator can quickly create multiple aliases for your Gmail. All the boxes will redirect the letters to your main mailbox. So having one account, you can automatically have many other mail accounts to Google.
Also, this Gmail generator is known under the following names: Googlemail Trick, Gmail dot Trick, Fake Gmail generator, Fake Gmail.