Answer: resends

AnswerCrossword Clue
RESENDS

Responds to "I never got it"

RESENDS

Forwards, say

RESENDS

Responds to the MAILER-DAEMON

RESENDS
E-mails anew
RESENDS
Faxes again
RESENDSMails again
RESENDSTransmits again.
RESENDSTransmits again
RESENDSForwards
RESENDSTransmits twice
RESENDSTransmits again, as an e-mail