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.
Latest Tesla news: Tesla share price continues to fall after Saudi Arabia's sovereign wealth fund is linked to investment in rival
SEC 'probe' takes its toll on Tesla as new research suggests that Tesla loses $6,000 on every $35,000 Model 3
RTX 280 Ti will come with 11GB of fast GDDR6 video RAM with a 352-bit memory bus offering 616Gbps
The scale of jobs lost to automation will be at least as large as those in the first three industrial revolutions
10nm Cannon Lake Core i3-8121U CPUs make a rare outing with Intel's NUC mini PC