Answer: resends

AnswerCrossword Clue
RESENDSResponds to "I never got it"
RESENDSForwards, say
RESENDSResponds to the MAILER-DAEMON
RESENDSE-mails anew
RESENDSFaxes again
RESENDSMails again
RESENDSTransmits again.
RESENDSTransmits again
RESENDSForwards
RESENDSTransmits twice
RESENDSTransmits again, as an e-mail
resendsRESEND, to send again