Email Deliverability Engineer (Postmaster)
Email Deliverability Engineer (Postmaster)
(OASE03_20 - Germany / Italy / Spain / France / Finland / Netherlands )

The job in a nutshell
You can work from any City in Europe, preferably near one of our offices in Hamburg, Bremen, Nuremberg, Dortmund, Olpe, The Hague or Espoo. This position will support our Cloud email platform, providing service to large customers for tens of millions of end users. Core competencies required include strong understanding of an ESP infrastructure, mail protocols, email deliverability and delivery analytics. You will be expected to provide quick resolution of difficult technical problems and we are asking you to share your major contributions regarding technical architecture, documentation and systems project management. The close cooperation between you and the Operations, Services and Engineering teams in the rest of the larger Open-Xchange organization, means growth opportunities abound inside and outside the team. In other words, this position is a great opportunity to build a career track.

The job in bulletpoints
  • Build and improve our email Infrastructure (Terraform, Ansible, Postfix, Dovecot)
  • Monitor and analyse our email stack, AV/AS and RBL
  • Help to define best practices for all email specific settings (SPF/DKIM/DMARC) and advanced email features
  • Troubleshoot and resolve email delivery related bugs and issues
  • Potential migration to new email delivery stack
  • Collaborate with global operations teams of other large email providers
  • Document architecture and essential function methodologies
  • Some domestic and international travel will be required

Your background
  • Bachelor's degree in a related field or 6+ years of experience working with Linux and email
  • Solid understanding of email infrastructure and concepts: SMTP, DSN (Delivery Status Notification, response codes and feedback loops
  • Deep knowledge of email stack (Postfix, Dovecot) in a high-volume email delivery environment
  • Deep knowledge of Anti-Virus and Anti-Spam frameworks and filters
  • Experience with email abuse and fraud protection
  • Experience with advanced email features and reputation management strategies
  • Experience with logging technologies such as Graylog, ELK, or Splunk
  • Interest in learning new technologies and working with proof of concepts to promote new technologies
  • DevOps Mindset
  • Excellent written and verbal communication skills; willingness to present technical information to a group

Our offer to you
  • Exciting work on a modern open-source cloud software in an internationally operating company
  • Plenty of scope for your own ideas and design decisions
  • Flexible working hours and the ability to work from home
  • Equipped with the up-to-date hardware
  • Trainings and continuous personal development
  • Language courses (e.g. German, English)
  • Flat hierarchies with an "Open Door" philosophy
  • Parental leave opportunity

Who we are 
We are a hidden champion. When it comes to open source communication, office productivity and DNS-based security software and services, we are one of the leading players out there. Our 250+ employees around the globe are the reason, why our key products – OX Cloud, Dovecot, and PowerDNS – are used by more than 200 million people for their private and business communications via partners such as Deutsche Telekom, GoDaddy, Strato, Orange, Comcast, or
For further questions, please contact Kerstin Florath via