SMTP Support Lead

Appealing Points:

• Take technical ownership of a mission-critical enterprise email-routing environment with strong SMTP, Retarus, and Microsoft 365 expertise.
• Lead L3 operational support, incident resolution, root cause analysis, and platform optimization for SMTP Hub and Retarus services.
• Act as the primary technical interface across multiple vendors, support teams, infrastructure, security, and migration partners.

Annual Salary : 4.5 Million Yen and above

Job Responsibilities:

• Administer and support the Retarus SMTP Hub platform.
• Manage SMTP relay configurations, connectors, routing policies, authentication settings, and mail flow rules.
• Maintain reliable and secure email routing across the SMTP Hub environment.
• Perform platform health checks, configuration reviews, and optimization activities.
• Support onboarding of applications and business services requiring SMTP integration.
• Provide technical leadership for SMTP Hub architecture and design.
• Assess the impact of infrastructure and Microsoft 365 changes on SMTP services.
• Develop and maintain solution designs, technical documentation, operational procedures, and runbooks.
• Support service enhancements, tenant consolidation, migration, and transformation initiatives.
• Support SMTP Hub implementation and configuration changes during tenant migration programs.
• Execute routing modifications and participate in testing, validation, and cutover activities.
• Support integration between the SMTP Hub and multiple Exchange Online tenants.
• Coordinate end-to-end connectivity validation and mail flow testing.
• Troubleshoot hybrid mail-routing issues across SMTP Hub, Exchange Online, and third-party platforms.

Job Qualification:

• Strong understanding of SMTP protocol, email routing, and mail delivery architecture.
• Hands-on experience managing SMTP gateways, email security platforms, or email relay solutions.
• Experience with Retarus, Exchange Online, or comparable enterprise messaging platforms.
• Knowledge of Exchange Online mail flow, connectors, transport architecture, and hybrid messaging environments.
• Experience with message tracing, log analysis, and complex email troubleshooting.
• Understanding of DNS and email authentication records, including SPF, DKIM, and DMARC.
• Familiarity with multi-tenant Microsoft 365 environments.
• Experience with incident, problem, and change management.
• Experience with service transition and operational readiness.
• Vendor and stakeholder management skills.
• Root cause analysis and continual improvement skills.
• Excellent communication, coordination, documentation, and presentation skills.
• Ability to work effectively across multiple organizations and vendors.
• Ability to operate independently and take technical ownership in a complex support environment.

Preferred Qualifications:

• Experience supporting large enterprise messaging and mail-routing platforms.
• Experience coordinating across multiple vendors and service providers.
• Experience with Microsoft 365 migration or tenant consolidation programs.
• Experience leading messaging infrastructure support engagements.

Required languages: Business level English required.

About Company:

This company has been certified as the “best employer” in 2020 by the “Top Employers Institute” which recognizes outstanding employers.

A global leader in consulting, technology, outsourcing, and next-generation services. With approximately 180,000 employees worldwide, the company helps clients in more than 50 countries stay ahead of the competition. Through the co-creation of innovative solutions, they help companies transform and thrive in an ever-changing world

[Measures against passive smoking]

No smoking indoors allowed

. Skillset Required: Technical ownership, SMTP, Retarus, Microsoft 365, L3 operational support, incident resolution, root cause analysis, platform optimization, SMTP Hub, vendor management, support teams coordination, infrastructure, security, migration partners, SMTP relay configurations, connectors, routing policies, authentication settings, mail flow rules, platform health checks, configuration reviews, optimization activities, SMTP integration, technical leadership, SMTP Hub architecture, solution designs, technical documentation, operational procedures, runbooks, service enhancements, tenant consolidation, migration, transformation initiatives, SMTP Hub implementation, configuration changes, routing modifications, testing, validation, cutover activities, integration, Exchange Online tenants, connectivity validation, mail flow testing, hybrid mail-routing troubleshooting, email routing, mail delivery architecture, SMTP gateways management, email security platforms, email relay solutions, message tracing, log analysis, email troubleshooting, DNS, email authentication records, SPF, DKIM, DMARC, multi-tenant Microsoft 365 environments, incident management, problem management, change management, service transition, operational readiness, vendor management, stakeholder management, continual improvement, communication, coordination, documentation, presentation skills, cross-organizational collaboration, independent operation