When you receive a new email in one of your mailboxes, we automatically create a contact with the incoming email address if it doesn't exist yet. As part of that, we also try to automatically create a company for that contact based on the last part of their email address. For example: if they're mailing from an email ending with "…@example.com" we'll create a company called "Example" with the domain "example.com".
To prevent this from creating a bunch of odd companies based off the domains of email providers (such as "gmail.com") we exclude a long list already (see our article Default List of Excluded Domains). However, a few might still slip through, or we might end up creating companies you don't agree with. In that case you can add a domain to be excluded from being automatically created as a company.
Adding an Excluded Domain
To add an excluded domain, go to the CRM settings and then to the Settings tab. There, click on the button saying Add domain. A modal will show up, asking for the domain to be excluded. Click Exclude domain, and you're all set!
Deleting an Excluded Domain
To delete an excluded domain, go to the CRM settings and then to the Settings tab. There, look for the domain that you want to delete, and click on the delete button that shows up on the right side of the field row when hovering over it.