If warmup is enabled in your email sending tool, you may receive warmup emails as part of the account setup process. These emails are intended to establish a positive sending reputation for your new accounts.
For more information and guidance on managing warmup emails, please refer to this guide. https://helpcenter.smartlead.ai/en/articles/108-what-is-an-email-warm-up-and-how-does-it-work-with-smartlead