{"id":437,"date":"2026-09-01T07:37:34","date_gmt":"2026-09-01T05:37:34","guid":{"rendered":"https:\/\/staging.martrexo.com\/deliverability-beratung\/"},"modified":"2026-09-08T07:51:12","modified_gmt":"2026-09-08T05:51:12","slug":"deliverability-consulting","status":"publish","type":"page","link":"https:\/\/martrexo.com\/en\/deliverability-beratung\/","title":{"rendered":"Email Deliverability Consulting"},"content":{"rendered":"
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Email Deliverability Consulting<\/h1>

Vendor-independent consulting on email deliverability<\/strong><\/p>\n

Emails land in spam, open rates decline, postmaster tools sound the alarm \u2013 and it's often unclear what's really behind it. We take a look at your deliverability. Independent of the sending system you use.<\/p>\n<\/div>

Upload email \u2013 free initial analysis<\/a>Schedule a consultation<\/a><\/div><\/div><\/div><\/div>
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The cause is rarely where you look first.<\/h2>\n<\/div><\/div>\n\n

A declining delivery rate almost never has a single cause. Sometimes it's an outdated SPF release, sometimes a DKIM key that was never rotated, sometimes a domain reputation that has quietly deteriorated over months, or simply a list full of inactive addresses. Most providers only analyze what's visible on their own platform. We look at the whole picture: DNS, authentication, sending behavior, content, list quality \u2013 and what the major mailbox providers actually require right now.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Open. Vendor-independent.
Nothing is off-limits.<\/h2>\n<\/div><\/div>\n\n

We run our own email gateways, so we know how deliverability works technically. That experience feeds into every analysis, regardless of the sending system used. Domain, setup and sending are analyzed exactly as they are. If the solution lies in a DNS correction, a change to the existing ESP, or a cleaned-up recipient list, that's exactly what we recommend.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Vendor-independent<\/h4>\n

Vendor-independent<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Transparent<\/h4>\n

Diagnosis, raw data and reasoning are all open \u2013 not just a traffic light.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Reviewed by humans<\/h4>\n

A consultant personally reviews every result before we send you feedback.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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The fastest path to an initial diagnosis: one email.<\/h2>\n<\/div><\/div>\n\n

A single email (EML, HTML, etc.) is enough \u2013 straight out of Outlook, Gmail, Apple Mail, or any other client. That one file already reveals a great deal: the complete delivery path, the authentication chain, technical anomalies in sending.<\/p>\n<\/div><\/div>\n\n

1. Upload<\/h4>\n

The email file is uploaded via the form on this page. Encrypted, confidential, GDPR-compliant.<\/p>\n<\/div><\/div>\n\n

2. Automated pre-check<\/h4>\n

The system reads the headers: SPF, DKIM and DMARC result and alignment, sender and routing information, anomalies in the delivery chain.<\/p>\n<\/div><\/div>\n\n

3. Human review<\/h4>\n

A deliverability consultant reviews the result and puts it in the context of your industry and sending volume. No automatically generated score without context.<\/p>\n<\/div><\/div>\n\n

4. Feedback<\/h4>\n

The result is a clear, well-founded assessment with concrete, prioritized recommendations for action, sent by email.<\/p>\n<\/div><\/div>\n\n

Get checked now<\/a><\/div>\n\n

Privacy notice:<\/strong><\/em><\/h4>\n

The email file may contain personal data (sender, recipient, content). It is used exclusively for the analysis, treated as confidential, and deleted once the consultation is complete.<\/em><\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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What we actually look at.<\/h2>\n<\/div><\/div>\n\n

Our in-depth deliverability audits go further. Alongside the purely technical checks, factors like reputation and list quality are decisive for delivery.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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Authentication<\/h4>\n

SPF, DKIM, DMARC (incl. policy level: none\/quarantine\/reject) and BIMI. DNS errors such as too many SPF lookups, expired or never-rotated DKIM keys, missing alignment between From-domain and signature.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Reputation & blocklists<\/h4>\n

Domain and IP reputation, listings with Spamhaus, SORBS, Barracuda, UCEPROTECT & co., analysis of Google Postmaster Tools and Microsoft SNDS.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Sending behavior<\/h4>\n

Irregular sending volumes, missing or incorrect IP\/domain warm-up, inconsistent sender identity (From-name, From-address, reply-to).<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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List quality<\/h4>\n

Bounce rates, spamtraps, stale contacts, role-based mailboxes (info@, sales@) in the marketing list, engagement history.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Content & technical delivery signals<\/h4>\n

One-click unsubscribe (List-Unsubscribe header, RFC 8058), TLS encryption in transit, spam triggers in subject and content, text-to-image ratio.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Bulk sender requirements 2026<\/h4>\n

Checked against the current requirements from Google, Yahoo and Microsoft: mandatory authentication, complaint rates below 0.3% (target below 0.1%), mandatory one-click unsubscribe, unsubscribe requests processed within 2 days.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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How our consultation works<\/h2>\n<\/div><\/div>\n\n

1. Initial check<\/h4>\n

Email upload, automated pre-check, initial personal assessment.<\/p>\n<\/div><\/div>\n\n

2. In-depth analysis<\/h4>\n

If needed, a full review of DNS, sending infrastructure, list quality and the postmaster data of the provider in use.<\/p>\n<\/div><\/div>\n\n

3. Action plan<\/h4>\n

Concrete, prioritized steps: what comes first, what comes next, and the expected impact.<\/p>\n<\/div><\/div>\n\n

4. Ongoing support<\/h4>\n

If you'd like, we support you with implementation, including a follow-up check after the changes.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Who this is for<\/h2>\n<\/div><\/div>\n\n