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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 OnlyRole 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 (i.e. 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.#J-18808-Ljbffr