Vulnerabilities in hosted email services allow attackers to spoof the identity of senders, bypassing security measures.
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Phishing Campaign Exploited Proofpoint Email Protections for Spoofing
Threat actors have exploited Proofpoint’s email protection service to deliver millions of spoofed phishing emails.
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SMTP Smuggling Allows Spoofed Emails to Bypass Authentication Protocols
A new attack technique named SMTP Smuggling can allow malicious actors to send out spoofed emails that bypass authentication mechanisms.
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