Warmbots is our email warm-up tool. With Warmbots turned on, your inbox will automatically exchange dummy messages with other inboxes connected to the tool, which will create a natural-looking traffic and will make your inbox a more legitimate sender.
You can connect your email account to Warmbots by going to Settings → Integrations, clicking Actions → Edit settings and clicking the toggle under Email warm-up. Make sure to up the number of messages sent to the maximum number.
Once you do that, log into your email account and set up the filter to filter out those messages - here are the instructions for Gmail and for Outlook. For other email providers, the filter is not needed.
Here's the video showing the whole process:
You can read more about Warmbots in these articles.