SMTP Postfix SME CGEMJP

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.