{"id":309,"date":"2026-08-28T12:35:40","date_gmt":"2026-08-28T10:35:40","guid":{"rendered":"https:\/\/staging.martrexo.com\/zustellbarkeit\/"},"modified":"2026-09-21T16:08:08","modified_gmt":"2026-09-21T14:08:08","slug":"deliverability-security","status":"publish","type":"page","link":"https:\/\/martrexo.com\/en\/zustellbarkeit\/","title":{"rendered":"Deliverability & Security"},"content":{"rendered":"
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Deliverability & Security<\/h1>

Our own gateways, proven reputation and award-winning security standards make sure your emails aren't just sent but actually seen.<\/p>\n<\/div>

Discuss deliverability<\/a>Technical details<\/a><\/div><\/div><\/div><\/div>
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The challenge: Firewalls & security gateways<\/h2>\n<\/div><\/div>\n\n

Firewalls and security gateways check every email before it arrives.<\/strong><\/p>\n

A message that shows as delivered in your campaign reporting can still end up in quarantine on the receiving server, without ever showing up in your own metrics.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Security gateways on the recipient side<\/h3>\n

Many companies place their own security gateways in front of the inbox as an additional check of every incoming email, independent of the mail provider.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Not a bounce... but covert quarantine<\/h3>\n

Emails classified as suspicious may not be rejected but held back, without returning an error message. You'll never know.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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A blind spot in your own statistics<\/h3>\n

The dispatch report shows \u201cdelivered\u201d, whether the email actually landed in the recipient's inbox or not.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Deliverability as a service component<\/h2>\n<\/div><\/div>\n\n

Deliverability doesn't happen by accident. It is the result of the right infrastructure, certification, and consistent reputation maintenance.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Our own gateways, worldwide dispatch<\/h3>\n

Dispatch via infrastructure we operate. No detour involving external third parties.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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CSA Certified<\/h3>\n

Whitelisting on the Certified Senders Alliance list ensures preferential treatment by the leading inbox providers.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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M3AAWG member<\/h3>\n

Active membership in the worldwide alliance against spam and abuse, a strong industry credential and commitment to email security best practices.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Reputation monitoring<\/h3>\n

Continuous bounce and complaint management makes sure anomalies are spotted instantly.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Authentication in brief<\/h2>\n<\/div><\/div>\n\n

Whether or not an email is considered trustworthy is decided by technical signals. At martrexo, these signals are configured properly and monitored from day one.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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SPF, DKIM, DMARC<\/h3>\n

The baseline authentication that proves: this email really does come from the stated sender.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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MTA-STS & TLS<\/h3>\n

Encrypted transport between mail servers, enforced and secured.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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DNSSEC<\/h3>\n

Secured DNS resolution is part of our commitment to the BSI guidelines (see Gold Status).<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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BSI Hall of Fame
Gold Status<\/h2>\n

Award-winning. Operated in Germany.<\/h3>\n<\/div><\/div>\n\n

martrexo was recognized by BSI, Bitkom e. V.<\/strong> and eco e. V.<\/strong> during the Email Security Year and awarded Gold Status<\/strong>\u00a0, the highest BSI Hall of Fame level.<\/p>\n

Gold Status stands for the implementation of the Technical Guidelines TR-03108<\/strong> (Secure Email Transport) and TR-03182<\/strong> (Email Authentication), in particular the implementation of DNSSEC.<\/p>\n

This puts martrexo in the same league as enterprises such as BASF, Porsche, Lufthansa and Deutsche Telekom.<\/p>\n<\/div><\/div>\n\n

Read more on BSI page<\/a><\/div>\n<\/div>\n\n
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For your IT<\/h2>\n<\/div><\/div>\n\n

We will handle the setup, operation and support for you, including continuous maintenance of the deliverability infrastructure.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Setup<\/h3>\n

We help set up the DNS records and advise on deliverability issues arising from third-party systems.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Interfaces<\/h3>\n

Integration with websites, databases and CRM systems. Your team is only called upon if custom integration is needed.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Single Sign-on<\/h3>\n

Available on request and included with the Connected tier and above.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Operation & maintenance<\/h3>\n

Ongoing maintenance, monitoring and updates of the deliverability infrastructure are handled by martrexo, without involving your internal IT.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Legal & data protection<\/h2>\n<\/div><\/div>\n\n

GDPR and BDSG-compliant, hosted in Germany. Double opt-in and audit-proof logging of all consents are standard features, not add-ons.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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\"DSGVO-konformer<\/span><\/div>\n<\/div>\n<\/div>\n\n
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Compliance<\/h3>\n

UWG-compliant, with a DPA and TOMs provided.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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EU-First<\/h3>\n

Operated on our own infrastructure in Germany. Data sovereignty is a key benefit.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Our support philosophy sets us apart<\/h2>\n<\/div><\/div>\n\n

We provide real human support at every tier. No call centers, no bots. From the Engage tier up, you can count on a personal Customer Success Manager being available to you.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Don't leave deliverability up to chance.<\/h2>\n<\/div><\/div>\n\n

Whether you have questions about your own deliverability or want to take a look at the technical details, your next step is just one click away.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Discuss deliverability<\/a><\/div>\n<\/div>\n\n
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View technical details<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-309","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/pages\/309","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/comments?post=309"}],"version-history":[{"count":30,"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/pages\/309\/revisions"}],"predecessor-version":[{"id":837,"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/pages\/309\/revisions\/837"}],"wp:attachment":[{"href":"https:\/\/martrexo.com\/en\/wp-json\/wp\/v2\/media?parent=309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}