Email Delivery & Infrastructure Specialist

Clearlight Insights is hiring a highly technical Email Delivery & Infrastructure Specialist with deep expertise in domain authentication, deliverability engineering, and cold outreach infrastructure. This role requires hands-on experience managing complex sending environments and protecting domain reputation across multiple channels and platforms.Role OverviewYou will own the entire email delivery stack for Clearlight Insights - from DNS configuration and warm-up systems to deliverability monitoring, de-risking cold outreach, and troubleshooting server-level issues. You will be responsible for ensuring our communications consistently reach inboxes globally.Core Responsibilities1. Domain, DNS & Authentication ManagementConfigure and maintain SPF, DKIM, DMARC (strict enforcement), BIMI, ARC, and MTA-STS.Build secure DNS architecture for multiple sending domains and subdomains.Implement proper alignment policies and continuously validate authentication performance.Perform DNS audits, propagation testing, and record integrity checks.2. Deliverability Engineering & DiagnosticsDiagnose inbox placement issues using tools like GlockApps, Postmark, Warmup Inbox, Mail-Tester, MXToolbox, ZeroBounce, and Google Postmaster Tools.Investigate bounce codes, spam triggers, blocklist issues, and MTA response errors.Monitor and maintain domain / IP reputation across major ISPs (Microsoft, Google, Yahoo, iCloud, corporate firewalls).Identify deliverability degradation early and execute recovery plans.3. Email Server & Hosting InfrastructureManage and troubleshoot email routing, SMTP servers, and hosting environments.Set up and manage custom sending environments (Google Workspace + additional SMTP relays).Configure warming schedules and volume ramp-ups for new domains.Liaise with hosting providers when server or DNS-level issues occur.4. Cold Outreach System Setup & ComplianceBuild and optimize multi-domain cold email setups (emphasis on high deliverability and low risk).Implement send-limit management, throttling rules, rotation across mailboxes, and A / B infrastructure setups.Ensure compliance with CAN-SPAM, GDPR, and domain protection policies.Integrate and monitor platforms such as Instantly, Apollo, Lemlist, Reply.io, etc.5. Monitoring, Reporting & OptimisationMaintain dashboards for spam rate, open rate, domain reputation, and deliverability signals.Produce weekly technical reports on domain health and sending performance.Proactively recommend system-level improvements.Required Experience5+ years of hands-on, technical experience in email deliverability, DNS management, and server-level troubleshooting.Deep understanding of MTA behaviour, SMTP protocols, ESP routing, and IP / domain reputation systems.Strong experience managing cold outreach infrastructure with multiple sending domains.Prior work with : Google Postmaster Tools, Microsoft SNDS, SPF / DKIM / DMARC setup tools, Sending platforms (GSuite, SMTP providers, cold email tools), Deliverability monitoring toolsAbility to debug and resolve complex domain-level and ISP-level issues.Experience supporting distributed teams or agencies is preferred.