Knower™ Tech is a brand belonging to the Wellow™ Group that aims to match qualified professionals with the market.


Incumbent responsibilities include design, implementation, administration and maintenance of Postfix, Microsoft 365 email solutions and related systems including Microsoft Exchange 2016, Exchange 2019, Exchange Online and hybrid-based messaging infrastructure as well as other M365 services. The incumbent will act as a subject matter expert and advisor on best practices and efficient solutions supporting the SMTP relay and Message Hygiene environment based on Proofpoint, Postfix, EOP, ATP and Ironport.


Technical Skills:

· The resource MUST have the following skills and experience:

• Experience in managing, operating, and maintaining a large, multi-site and complex messaging infrastructure based on Microsoft Exchange.

• Knowledge of SMTP Relay, Mail Gateway, Spam and Virus filtering systems (Proofpoint,

IronPort or similar)

• Experience working with customers on Cloud and M365 specific solutions and deployments.

• Knowledge of Microsoft Exchange 2016/2019/Exchange on-prem environments.

• MS Teams, SharePoint Online, OneDrive for Business, Yammer, PowerPlatform and other M365 related services.

• Knowledge in scripting, in particular PowerShell scripting and MS Graph to automate

processes in MS Exchange Online, SharePoint Online, Teams and other M365 components.

• Knowledge of Linux/Unix systems administration, including shell scripting (Redhat


• Understanding of SMTP.

• Knowledge of Postfix and Sendmail.

• Exposure in migration projects from on-premises systems to Microsoft 365 and/or tenant to

tenant migration and related integration features;

• Excellent knowledge of English (both written and verbal).

What we offer:

  • Salary package and contract compatible with experience and ambitions
  • Benefits (day off on birthday, health insurance, extra vacation days, admission kit, various get-togethers, etc.)
  • Training plan and continuous learning environment
  • Skills development opportunities
  • Excellent work environment


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