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Job Title: NGET SCADA SMTP Postfix SME
Location: Birmingham, Hybrid working model
Duration: 27/02/2026
Rate: 550.00 inside IR35 - via Umbrella company
MUST EITHER HOLD OR BE ELIGIBLE FOR SC CLEARANCE
We are seeking a highly skilled and hands-on Postfix SMTP Relay Engineer to design, document, build, and deploy an on-premises email relay infrastructure using Postfix. The successful candidate will have deep expertise in SMTP protocols, mail routing, and secure mail server configuration, as well as experience working with Low-Level Design (LLD) documentation.
You will be responsible for implementing a robust, secure, and scalable Postfix-based relay solution that integrates seamlessly with enterprise systems.
Key Responsibilities:
- Design and deploy an on-premises SMTP relay infrastructure using Postfix.
- Interpret and implement Low-Level Design documentation.
- Ensure secure mail routing and compliance with enterprise security standards.
- Integrate Postfix with core enterprise solutions such as VCF, HPE, SIEM, and LDAP/AD.
- Troubleshoot mail delivery and server performance issues.
- Automate and monitor processes using scripting (e.g., Bash, Python).
- Produce comprehensive technical documentation.
Required Skills & Experience:
- Extensive hands-on experience with Postfix in enterprise environments.
- Strong understanding of SMTP protocols, email routing, and mail security.
- Proficiency in Linux system administration (RHEL, CentOS, Ubuntu).
- Experience with TLS, SPF/DKIM/DMARC, and SASL protocols.
- Ability to integrate Postfix into enterprise systems (VCF, HPE, SIEM, LDAP/AD).
- Strong troubleshooting and problem-solving skills.
- Scripting experience for automation and monitoring (Bash, Python).
- Excellent technical documentation skills.
Preferred Qualifications:
- Knowledge of high availability, load balancing, and mail queue management.
- Familiarity with email archiving, retention policies, and compliance frameworks.
