Email Infrastructure ✦ Inbox-First Architecture
Email Infrastructure ✦ Inbox-First Architecture
High-Volume Email Infrastructure, Built for Deliverability
Etechinvest designs, deploys, and maintains the SMTP infrastructure behind high-volume email programs — PowerMTA configuration, MailWizz and Interspire deployment, IP warm-up, DNS authentication, and ongoing deliverability monitoring.With 8+ years of hands-on experience managing sending infrastructure at scale, we configure every server for maximum inbox placement, not just maximum throughput. From single-server setups sending 100K emails/month to multi-IP architectures handling 5M+ monthly sends — every deployment is engineered to land in the inbox and stay there.
Every infrastructure engagement includes full DNS authentication
setup (SPF, DKIM, DMARC, rDNS), bounce handling configuration,
firewall hardening, and a structured IP warm-up plan. We document
every configuration at handoff so your team can maintain it
independently — and we offer ongoing monitoring retainers for
clients who need continuous oversight of sender reputation,
blocklist status, and inbox placement rates.
- PowerMTA Installation & Config
- SPF / DKIM / DMARC Setup
- Bounce Handling Rules
- MailWizz Deployment
- rDNS Configuration
- Blocklist Monitoring
- Interspire Setup
- IP Warm-Up Planning
- Inbox Placement Audits
Deliverability Audits & Reputation Recovery
If your emails are landing in spam, getting blocked, or showing
declining open rates, our deliverability audit identifies the root
cause and provides a prioritized remediation roadmap — covering
DNS authentication gaps, sending reputation issues, list hygiene
problems, and content-level spam triggers.
- Full DNS authentication review across all sending domains
- Sender reputation scoring and blocklist diagnostics
- Inbox placement testing across Gmail, Outlook, Yahoo
- List hygiene analysis and suppression recommendations
- Written remediation roadmap with prioritized action items
Say hello!
Ready to Fix Your Deliverability?
Whether you need a full infrastructure build or a
deliverability audit on an existing setup — book a free
30-minute consultation and we'll tell you exactly what
needs fixing before you commit to anything.
Data-Driven Marketing Campaigns
- Every PowerMTA and MailWizz install is configured by hand for your specific sending profile — not a default script
- IP rotation, dedicated IPs, and domain separation are planned before deployment, not retrofitted after problems appear
- Monitoring and alerting are set up at the infrastructure level so issues are caught before they affect campaign performance
Core Services
Core Services
Our Most Valuable Services
Our skilled solutions, from strategy to execution, are made to boost performance, spur growth, quantifiable value.
WordPress/Elementor builds and migrations, custom LMS platforms, landing pages, and full-stack web applications tailored to your business requirements.
PowerMTA & SMTP server setup, MailWizz deployment, DNS authentication (SPF/DKIM/DMARC), IP warm-up, blocklist monitoring, and inbox placement audits.
Home Assistant deployment, Z-Wave device integration, Frigate NVR camera systems with AI detection, Alarmo alarm panel setup, and ongoing remote monitoring.
n8n pipeline design, server provisioning automation, AI-assisted reporting, chatbot integrations, and third-party API connections across CRMs, payment systems, and messaging platforms.
Linux server builds from scratch, firewall configuration, security hardening, DDoS protection, uptime monitoring, automated backups, and incident response.
Twilio, Telnyx, Ultimate SMS deployment, opt-in compliance and campaign automation