New report exposes the SURBL Blacklist as a leading cause of silent delivery failures in 2026 — and how senders can identify, fix, and prevent a listing ...

Hackers are exploiting a vulnerability in the Gravity SMTP WordPress plugin to extract configuration data, including API keys ...

Gravity SMTP WordPress vulnerability CVE-2026-4020 has drawn 17 million automated exploit attempts since May 2026, draining ...

Wordfence has blocked 17M+ exploit attempts targeting a Gravity SMTP bug that leaks API keys, OAuth tokens, and full system reports without authentication.

The threat actor known as PCPJack has hijacked cloud servers associated with Amazon Web Services (AWS), Google Cloud, and Microsoft Azure to create a covert SMTP email relay network. "Compromised ...

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“Coffin-Codes-Pro establishes a connection to Gmail’s SMTP server using hardcoded credentials, namely sphacoffin@gmail [.]comand a password,” the report says. “It then sends a message to a second ...

smtpproxy is a Python script that implements a small SMTP proxy server. It can be used, for example, when the real remote SMTP server requires applications to implement the pop-before-pp ...

Hackers are actively exploiting a recently disclosed RCE vulnerability in Zimbra email servers that can be triggered simply by sending specially crafted emails to the SMTP server. The Zimbra remote ...

When developing Python applications that require robust email functionality, open-source Python APIs for email files offer powerful and flexible solutions for ...