Other mail

You're looking for other types of mail besides regular postal mail. Here are some examples:

1. Email: Electronic mail sent through the internet, often used for personal and professional communication.
2. Package delivery: Services like UPS, FedEx, and DHL that deliver packages and parcels to customers.
3. Courier services: Companies that deliver documents, packages, and other items quickly, often for a fee.
4. Fax: A way to send documents electronically over a phone line, often used for business and official purposes.
5. Text message (SMS): Short messages sent between mobile phones, often used for personal and informal communication.
6. Instant messaging: Real-time text-based communication services like WhatsApp, WeChat, and Slack.
7. E-billing: Electronic bills sent to customers via email or online platforms.
8. Digital certificates: Secure electronic documents used for authentication and verification purposes.
9. Secure email: Encrypted email services that protect sensitive information from unauthorized access.
10. Digital mail: Electronic versions of physical mail, such as digital invoices, receipts, and statements.

These are just a few examples of the many types of mail that exist. Do you have a specific type of mail in mind?