We are a fully remote team seeking a skilled Email Systems Engineer with a DevOps mindset to join our team. You will be responsible for managing, optimizing, and scaling our email infrastructure (SMTP, IMAP, Postfix, Haraka), ensuring high deliverability rates, and maintaining the reliability and security of our email systems. This role offers the opportunity to collaborate with our development team to integrate and innovate email-related solutions while contributing to the scalability of our platform.
Design, implement, and maintain email server infrastructure (Postfix, Haraka).
Manage email protocols such as SMTP, IMAP, and POP3 to ensure seamless operation.
Implement and optimize email authentication standards (SPF, DKIM, DMARC).
Support the Dev team with DevOps and CI/CD pipelines.
Monitor and troubleshoot email deliverability issues, resolving reputation or bounce problems.
Ensure the email infrastructure meets security and compliance standards (e.g., GDPR, CAN-SPAM).
Automate routine maintenance tasks to improve efficiency and system reliability.
Maintain documentation of system configurations, processes, and best practices.
Stay updated on industry trends and propose improvements to our email architecture.
Strong experience with email systems and protocols (Postfix, Haraka, Dovecot, Cyrus, SMTP, IMAP).
Proficiency in Linux server administration.
Experience with DNS management, including SPF, DKIM, DMARC configuration.
Knowledge of email deliverability strategies, reputation monitoring, and anti-spam measures.
Familiarity with DevOps tools (Docker, Kubernetes, Jenkins, GitHub Actions) and CI/CD workflows.
Experience with monitoring tools (Prometheus, Grafana, or similar).
Programming/scripting skills in Python.
Understanding of database management systems (PostgreSQL).
Strong problem-solving abilities and attention to detail.
Excellent communication and teamwork skills.
Self-driven and able to work independently in a remote environment.
As spam filters tighten, 52% of business emails go unseen, crippling sales and collections for B2B companies. Mission Inbox solves this by giving companies full control of their email infrastructure—without needing to manage complex servers or rely on Gmail hacks.
We’ve built a real email infrastructure (like SendGrid or Mailgun), but purpose-built for sales and outbound email. Mission Inbox combines two powerful components:
MI Shield – our AI-powered pre-send spam filter that blocks bad emails before they’re sent. It protects your domain, improves inbox placement, and ensures only high-quality, personalized emails go out.
OBM Engine – a SendGrid-like API layer designed specifically for outbound sales email. It lets platforms, founders, and CRMs plug into our infrastructure and start sending with confidence—no warm-up tricks, no rented Gmail inboxes.
Everything we do is transparent. Our clients own their domains, DNS, mailboxes, and sending identity. We don’t hijack nameservers, we don’t lock people in, and we don’t hide anything.
Whether you’re a sales team, cold email platform, or founder building your own tool—Mission Inbox gives you what you’ve always wanted from email infrastructure: deliverability that scales, with control you can trust.
