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UltaHost Logo UltaHost · IT - Administration

IP Reputation Specialist

· Job Posted February 24, 2026
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Job Description

As an IP Reputation Specialist, you will proactively monitor and manage the reputation of our IP address blocks, prevent blacklisting, detect abuse (spam, malware, DDoS, etc.), and ensure optimal email deliverability. You will also play a critical role in supporting clients with IP reputation issues and implementing reputation monitoring tools and best practices.

Job Responsibility

  • Monitor and manage the reputation of IP ranges used within our infrastructure
  • Track DNS-based blacklists (DNSBL/RBL), such as Spamhaus, SORBS, URIBL, etc., and take appropriate action when listed
  • Detect and mitigate spam, botnets, DDoS, and other abuse incidents
  • Improve and maintain email deliverability across our platforms
  • Analyze and respond to abuse reports, maintaining documentation and resolution workflows
  • Provide technical support to clients regarding IP reputation issues
  • Collaborate with DevOps and Software teams to improve automation and reporting around abuse handling
  • Manage and configure SPF, DKIM, DMARC, rDNS, and other email authentication protocols

Requirements

  • Minimum 2 years of experience in network/system administration, cybersecurity, or related fields
  • Hands-on experience with IP reputation monitoring and email deliverability
  • Strong understanding of SMTP, SMTP relays, WHOIS, rDNS, PTR, and abuse handling processes
  • Advanced knowledge of TCP/IP, DNS, firewalls, and IDS/IPS technologies
  • Familiarity with major blacklist services (Spamhaus, Barracuda, SpamCop, etc.)
  • Proficiency in Linux and command-line tools
  • Strong analytical and problem-solving skills
  • Good command of written and technical English

Nice to have

  • Basic scripting knowledge (e.g., Python, Bash) is a plus
  • Experience in the hosting or ISP industry
  • Experience working with abuse automation or ticketing systems
  • Security certifications (e.g., CEH, CompTIA Security+)
  • Familiarity with logging and monitoring tools (e.g., ELK Stack, Graylog, Grafana)

What we offer

  • Remote Flexibility
  • Career Growth
  • Inclusive Culture
  • Skill Growth
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