At the risk of prolonging an off-topic discussion of spam, here's the response I got from our mail security staff. I, like others on this list, was confused into thinking that someone might be spamming the list from our server, which was not the case.
--Tom Wainwright > > Actually, the @nems.noaa.gov was tacked onto the "From:" header as the > message was coming into NOAA for you. It's an annoying "feature" of our > inbound gateway. It just wants to make sure all addresses are valid > smtp addresses by tacking on it's own local domain, if there is no > domain, or an incomplete domain on the address. It causes > confusion...sorry 'bout that.
