Tutanota, with its full white-label customizations, is the perfect solution for your company, as you can present Tutanota mailboxes with your corporate design: Employees insurance email list and external recipients won't notice they're accessing Tutanota. They'll only see your website and branding.
Full list of customizations for your custom email domain
Use your own custom email address
Place access to your customized version of Tutanota on your own website

Set custom logo
Set custom colors
Set custom meta tags such as title and social media texts
Set a custom print link
Set a custom data privacy link
Set custom text in the notification email to external recipients of encrypted emails
Switch between formal and informal forms of address (“Sie” instead of “du”, only available in German).
How can Tutanota be? An example of Tutanota with customizations
Tutanota's Unlimited Business plan includes a set of customizations that allow you to tailor Tutanota for business use. By using Tutanota Whitelabel customizations, you can tailor Tutanota to your corporate identity. Here's an example of what Tutanota might look like.