Stay secure with the latest email security updates, best practices, and threat alerts to protect your inbox and sensitive information.
Search across headline titles and summaries.
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.
Because QR codes can be used for phishing as easily as an email or text can, organizations must remain vigilant when dealing with them.
No classified systems involved apparently, so there's that Chinese snoops stole about 60,000 State Department emails when they broke into Microsoft-hosted Outlook and Exchange Online accounts belonging to US government officials over the summer.…
Chinese hackers stole tens of thousands of emails from U.S. State Department accounts after breaching Microsoft's cloud-based Exchange email platform in May. [...]
Abnormal Security also found a 167% increase in advanced email attacks
While cloud-based email offers more security than on-premises, insurance firms say it matters whether you use Microsoft 365 or Google Workspace.