to send a amount greater than what is required, oversupply
(email) to send an email to everyone on a distribution list
From Middle English oversenden (“to send over, transmit”), from Old English ofersendan (“to transmit”), corresponding to over- + send, from Proto-Germanic*uber (“over”) + *sandijaną (“to send”). Cognate with Middle Dutch oversenden (“to send over”).
English Wiktionary. Available under CC-BY-SA license.