Stay secure with the latest email security updates, best practices, and threat alerts to protect your inbox and sensitive information.
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Background for this topic.
Email is a system for exchanging digital messages, typically using mail servers and clients over a network. In security, it includes both the messages and the accounts, servers, domains, and authentication mechanisms that handle them. Email commonly carries phishing links, malicious attachments, and fraudulent requests for payments or credentials; compromised accounts can also be used to impersonate trusted people and conduct further attacks.
Defenses include filtering and malware scanning, phishing-resistant multifactor authentication, careful handling of links and attachments, and monitoring for unusual login or sending activity. Domain controls such as SPF, DKIM, and DMARC help receiving systems detect messages that are forged or sent without authorization, while encryption protects message contents in transit or at rest when correctly implemented. Security teams should preserve relevant headers and mailbox activity so suspicious messages can be investigated, removed, and used to identify affected accounts and other recipients.
Cloud services provider Rackspace on Thursday confirmed that the ransomware gang known as Play was responsible for last month's breach
The hosting services provider shared new details on the breach that took down its Hosted Exchange Email service.
Play gang blamed, ProxyNotShell cleared and hosted Exchange doomed Rackspace has confirmed the Play ransomware gang was behind last month's hacking and said it won't bring back its hosted Microsoft Exchange email service, as it continues working to recover customers' email data lost in the December 2 ransomware attack.…
Rackspace revealed on Thursday that attackers behind last month's incident accessed some of its customers' Personal Storage Table (PST) files which can contain a wide range of information, including emails, calendar data, contacts, and tasks. [...]
A data dump of Twitter user details on an underground forum appears to stem from an API endpoint compromise and large-scale data scraping.
The leaked data included names, usernames, email addresses, follower counts and creation dates
A data leak described as containing email addresses for 200 million Twitter users has been published on a popular hacker forum for about $2. BleepingComputer has confirmed the validity of many of the email addresses listed in the leak. [...]