the.com/sender
The hopeful party who clicks go and prays the bytes find a home.
means The person, device, or program that originates and transmits a message to a recipient.
from From Old English 'sendan,' to dispatch or cause to go — the same root that launched letters, soldiers, and regrettable texts alike.
Email headerEvery email names its sender in machine-readable headers.
Slang flipClimbers call a hard route a 'sender.'
SpoofableThe 'From' field lies easily; trust nothing unsigned.