Deliverability.
Arriving isn't a coincidence — it's trust that's been built.
Email marketing only works if it gets delivered. Reliable delivery isn't built overnight — it takes years of consistent, clean dispatch. Martrexo® brings exactly that established sender reputation — backed by our own gateways, controlled reputation and end-to-end authentication, operated in Germany and recognized by the leading institutions.
Trust that's grown over years
Mailbox providers decide between “inbox” and “spam folder” based on sender reputation – a kind of trust score built up from a sender's behavior over time.
This value can't be bought or forced; it grows with every cleanly delivered campaign, with low complaint rates and a consistent, reliable dispatch pattern.
This is exactly the head start that new senders lack: Martrexo has been sending through an established, continuously maintained infrastructure for years. That proven delivery track record already exists — and every email sent through the platform benefits from it from day one, instead of having to build up that trust the hard way.
Deliverability as a service
At Martrexo, deliverability isn't a side effect — it's an actively managed service. Dispatch runs through our own, independent gateways — worldwide, with no third-party providers. Our certifications aren't one-off seals — they reflect continuously maintained standards and sender reputation.
CSA Certified
As a Certified Senders Alliance sender, Martrexo is listed on the Certified IP List and is continuously audited. This listing supports preferential handling by participating mailbox providers and webmail services.
M3AAWG member
As a member of the Messaging, Malware and Mobile Anti-Abuse Working Group, Martrexo commits to worldwide quality standards and supports industry best practices for combating spam and abuse.
On top of that comes ongoing reputation monitoring alongside clean bounce and complaint management: soft and hard bounces are classified and handled accordingly, complaints are processed automatically, and recipient lists are kept clean. That's how the reputation we've built stays stable for the long term.
BSI Hall of Fame –
Gold Status
Martrexo, a brand of Webstrategy GmbH, was recognized by BSI, Bitkom e.V. and eco e.V. in the Email Security Year with Gold Status — the highest tier.
This recognition underscores our commitment to the Technical Guidelines TR-03108 (Secure Email Transport) and TR-03182 (Email Authentication). Gold represents the full implementation of DNSSEC.
Authentication “out of the box”
Every email sent through Martrexo is fully authenticated — with no manual effort required.
SPF, DKIM, DMARC
For provable sender authenticity — set up fully, with no manual effort.
MTA-STS and TLS
For encrypted transport, guarding against downgrade attacks along the delivery path.
Reverse DNS
For clean delivery signals that receiving systems actively check.
List-Unsubscribe
One-click unsubscribe per RFC 8058 — required by major mailbox providers for qualifying bulk senders.
Monitored around the clock
Trust that's been built needs to be maintained. That's why stability at Martrexo is actively monitored. Every component of the platform, all interfaces to customer systems and to our own services, is continuously checked — including their dependencies on one another.
Automated alert systems trigger before an anomaly turns into an outage. The current operating status is fully transparent — from the database through the job queue to bounce synchronization, CRM integration and email processing.
Legal & Data Protection
Martrexo complies with the GDPR and the German Federal Data Protection Act (BDSG); hosting takes place exclusively in Germany.
Double opt-in, opt-in management, and audit-proof logging of consents are standard features. AVV and TOMs are provided.
As a provider operated in Germany with its own infrastructure, Martrexo offers genuine data sovereignty — a governance argument that matters wherever questions around Schrems II and the CLOUD Act come into play.
For IT
Setup, operation and support are all handled for you: getting started needs just a few DNS entries. Everything else is taken care of entirely by Martrexo.
Existing systems (websites, databases, CRM) can be connected via purpose-built interfaces; technical effort only arises where an interface is needed. Single sign-on ensures an access architecture that's always up to date and maintenance-free.
Support as a Differentiator
At Martrexo, you get real, human support — in every tier. No call centers, no bots. From the Engage tier onward, a personal Customer Success Manager is also on hand.
Delivery you can rely on.
Trust that's been built, our own gateways, end-to-end authentication — the foundation for every campaign. Best discussed in conversation, tailored to your specific needs.