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You're looking for information about mail or email!

Here are some common topics related to mail:

1. Email: Electronic mail, a method of sending messages over the internet.
2. Postal mail: Physical mail sent through the postal service, such as letters, packages, and bills.
3. Mailbox: A container for receiving and storing mail.
4. Email client: A software application used to send and receive email, such as Microsoft Outlook or Mozilla Thunderbird.
5. Spam mail: Unsolicited commercial email messages, often considered junk mail.
6. Email etiquette: Guidelines for writing and sending professional and respectful email messages.

Which aspect of mail would you like to know more about?