The US government's aviation safety authority was forced to batten down the hatches on one of its mail servers after it emerged that the machine could be used to relay spoofed messages.
According to mail relay blacklists such as the Mail Abuse Protection Systems (MAPS), an email server run by the Federal Aviation Administration (FAA) had been open to abuse for some time.
It seems a junk mailer used the vulnerable server to send out spam, prompting MAPS to add the machine to its blacklist of mail relay servers.
But despite being open to abuse by spammers, the server could also have been used to forge authentic-looking emails from the FAA itself, as a fake email would still have legitimate headers showing the FAA.gov server as its origin - a worrying thought after the recent terrorist attacks.
But the FAA seems to have now blocked access to the mail port on the server, thus solving the problem.
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