Simple Mail Transfer Protocol (SMTP) Architect / SME

Experis - ManpowerGroup; England; Remote; GBP 60,000 - 80,000; Full time

Job summary

A leading technology consultancy is urgently seeking an SMTP Architect / SME to lead the design and implementation of mail systems. The role requires a strong background in SMTP, Postfix, and Linux, along with the ability to produce detailed design documentation. This remote position includes occasional travel to client sites, offering a competitive daily rate for the duration of the project.

Qualifications

• Experience with SMTP and Message Transfer Agents is crucial.
• Expertise in Linux with knowledge of Postfix and Dovecot.
• Strong understanding of DNS records and mail security is required.

Responsibilities

• Lead/support SMTP detailed design and build.
• Create low level design and build documents.
• Implement solutions for on-premises deployment.

Skills

SMTP

Dovecot

Postfix

Linux

Low Level Design

Communication Skills

DNS Records

Security Best Practices

Job description

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 (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.