Expire in: a month
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 frameworksDo not include the following in your job application, CV, or cover letter:
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