Edit
/etc/zfs/zed.d/zed.rc
uncomment
ZED_EMAIL_ADDR="mail@example.com"
and add a valid email address.
uncomment
ZED_EMAIL_PROG="mail"
uncomment
ZED_EMAIL_OPTS="-s '@SUBJECT@' @ADDRESS@"
uncomment
ZED_NOTIFY_VERBOSE=0
if you want to get an email after every scrup set the value to 1
save the file and restart zed service
systemctl restart zed.service