Related Clues:
- It may come with attachments
- Sends with a click
- Target of some filters
- Forward, perhaps
- Where all addresses include @
- What a server may serve
- Letters that can arrive at any time
- Write, these days
- Office communication
- Virtual inbox filler
- Postal alternative
- Something you click to open
- Deliver spam
- Send, on a computer
- Cyber-missive