sender
nounUK /ˈsɛndə/
US /ˈsɛndər/
A sender is the person who sends something.
The sender of the letter forgot to write a return address.
OTHER MEANINGS
2. The part of a device or system that transmits a signal or message.
The sender in the radio unit was broken, so no signal went out.
3. The originator of an email or text message shown in the header.
Check the sender before you open that attachment.
4. A person who dispatches goods or correspondence on behalf of others.
The sender arranged for the boxes to be delivered by Friday.