mailrelay
nounUK /ˈmeɪlriːleɪ/
US /ˈmeɪlriːleɪ/
A mailrelay is a computer that passes email along to the right place.
The mailrelay sent my message to the school's inbox.
OTHER MEANINGS
2. A service that forwards messages between different email systems.
The company uses a mailrelay to connect its old and new email systems.
3. A device or program that passes physical or digital mail from one stop to the next.
The post office acts like a mailrelay for letters going across the country.
4. A person who passes messages along in a chain of communication.
In the game, each child was a mailrelay, whispering the message to the next.