IncaMail is a Swiss Post web service that enables e-mails to be sent securely. The service uses a system to ensure that data is protected and that there are no other unauthorized users.

IncaMail enables you to send e-mails with attachments. When sending an e-mail with an attachment, you can send it in any format that is supported by the service. The attachment is sent in a separate e-mail message and has its own content header. The message is sent to the recipient as an attachment and can be viewed in the recipient's inbox.