Related Clues:
- Cyberspace note
- Cyberjotting
- Correspondence sans stamp
- It doesn't leave a paper trail?
- Virtual inbox fill
- It may come with attachments
- Neighbor of D
- 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