Customers of KMTelecom email service may have noticed a problem with their email, being blocked or marked as spam since Tuesday evening.
According Russ Leitzen who works for KMtelecom's IT department, an email address that ended with kmtel.com was compromised on election night and sent out thousands of spam emails. "Once so many email addresses from a specific server are marked as spam that server gets put on blacklists," he explained. "That causes the emails being sent to some mail servers to be blocked or marked as spam."
Leitzen explained there are white lists and black lists regarding mail servers. The white lists are mail servers that don't have a lot of reported spam activity and are considered to be in good standing. A blacklist mail server is one that has had a lot of questionable activity coming from its servers. "The compromised email address was enough to get Kmtel mail server put on the black list," he said.
As of Friday afternoon he believes that KMTel email server had been removed from a lot of the blacklists across the internet but it still remains on a few and may continue to cause service disruption. "By the end of the weekend the problem will be resolved."
To prevent your email from becoming compromised, Leitzen suggests making sure you have a strong password protecting your email address and that you run anti-virus and malware protection software often on your PC. "Your email can become compromised if you have malware or a virus on your computer, it will capture your email password and use your email to send out spam emails," he explained. "That's what a lot of the viruses are designed to do."
KMTelecom has experienced this problem before but not for several years.