Are there any options for email encryption in Hostinger Webmail?
Hostinger Webmail currently does not offer built-in email encryption options. However, users can encrypt individual emails before sending them through third party tools or web browsers that support email encryption. Gmail and Outlook also allow encrypting emails sent from their webmail interfaces. So encrypting emails before sending them from Hostinger Webmail through other email clients is possible.
Source: https://webmailup.com/hostinger-webmail/