Note: The job is a remote job and is open to candidates in USA. Bayforce is seeking a highly experienced Email Security & Anti-Spam Technical Consultant for ongoing, project-based consulting work. The role focuses on expert-level analysis of email delivery, anti-spam technologies, domain and URI reputation, blacklist systems, and Linux-based email infrastructure, including reviewing configurations and logs, analyzing email messages, documenting findings, and potentially providing formal testimony.
Responsibilities
- Provide expert-level consultation regarding email delivery, spam detection, domain reputation, and anti-spam technologies
- Explain how URI/domain blacklist (DBL) providers operate and how their data is used by email security and anti-spam systems
- Analyze how domains, URLs, sender information, originating mail servers, IP addresses, and other message characteristics are evaluated during spam detection
- Review Postfix and Rspamd configurations to determine how blacklist, reputation, and anti-spam services are being used
- Analyze why specific emails were accepted, rejected, flagged, scored, or otherwise handled by an email security system
- Analyze raw EML/MIME files, including headers, routing information, authentication results, message content, URLs/domains, and other relevant characteristics
- Correlate email findings with Postfix/Rspamd logs and server configurations
- Evaluate email origin and authenticity, including potential spoofing or manipulation
- Document technical methodology, evidence, and conclusions clearly and defensibly
- Potentially prepare and sign affidavits, declarations, or other formal technical findings
- Potentially participate in depositions or provide expert testimony regarding email systems, anti-spam technologies, and specific technical findings
Skills
- Deep understanding of SMTP and Internet email delivery architecture
- Strong knowledge of URI/domain blacklist systems (DBLs) and DNS-based blocklists
- Experience with Spamhaus or comparable email/domain reputation providers
- Strong hands-on experience with Rspamd, including scoring, filtering, reputation, and blacklist functionality
- Experience with Postfix and Linux-based mail server environments
- Strong understanding of email headers and raw EML/MIME message structure
- Expertise with SPF, DKIM, and DMARC
- Strong understanding of email spoofing, sender authentication, IP/domain reputation, and message routing
- Ability to analyze mail-server logs and configurations and correlate findings with individual email messages
- Strong Linux knowledge sufficient to understand and evaluate the underlying mail-server environment
- Significant professional experience in email security, anti-spam, email infrastructure, email deliverability, or messaging systems
- Experience operating or engineering large-scale email or anti-spam environments
- Background with an email security provider, ISP, hosting provider, cybersecurity organization, or company operating its own mail infrastructure
- Experience conducting technical forensic analysis of email messages
- Experience preparing affidavits, declarations, expert reports, or other formal technical findings
- Prior deposition or expert witness experience is a plus, but not required
Benefits
- Remote – East Coast/Southeast US area preferred
- Ongoing, As-needed project consulting
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