Simple Mail Transfer Protocol (SMTP) Architect/SME

Role Title: Simple Mail Transfer Protocol (SMTP) Architect/SME
Location: Remote - Occasional Travel to client site in Warwick.
Duration: 15/09/2025 with potential to extend and join Build team.
Clearance: Active SC/SC Eligible
Rate: £575 per day - PAYE via Umbrella Only

Role Description:
Urgently required to lead/support SMTP Detailed Design and maybe build.
Must have experience of Postfix. A Linux SME with knowledge of RHEL and Dovecot/Postfix with emphasis on Message Transfer Agent "satellite" configuration for on-premises deployment and operating between closed domains (ie no SaaS or email gateway to Internet). The SME is responsible for the low level design and build documents for a Red Hat Postfix satellite MTA and to implement the solution.

Key Skills:

• Strong understanding of SMTP and Message Transfer Agents
• Experience of Dovecot and Postfix
• Experienced in Low Level Design and Build documentation.
• Experienced in build and configuration on Linux within a Broadcom VCF (VMware virtual platform).
• Excellent communication and interpersonal skills.
• Strong understanding of security best practices.
• Strong understanding of DNS records and mail security and validation (MX, DKIM, DMARC)

Desirable Skills:

• Experience with on-premises-based mail solutions.
• Knowledge of hybrid on-premises to SaaS mail services
• Excellent coordination and collaboration with infrastructure teams.
• Understanding of security and risk implication around email relaying.