Developer first. Researcher by obsession.
Leo builds Python/Django platforms, runs dedicated-IP email infrastructure, and publishes free, tested defenses for Microsoft 365 and browser phishing. One engineer, direct access, no handoffs.
Python/Django engineering
Platforms, integrations, automation, scraping and data pipelines, deployment.
Email infrastructure & deliverability
Dedicated-IP SMTP, SPF/DKIM/DMARC, blacklist remediation, inbox placement fixes.
Defensive research
7 bundles, 31 artifacts. KQL detections, Conditional Access rollouts, IR runbooks. No paywall.
Services
Email infrastructure, engineering, Microsoft 365 security. Tell us what you need.
Ongoing Maintenance & Support
Proactive server monitoring, maintenance, updates, and priority support.
From $79Payment Gateway Integration
Integrate crypto, Stripe, PayPal, or custom payment gateways into your platform.
From $129Custom Development
Custom feature development, modifications, branding, and integrations for your platform.
From $100Server Setup & Deployment
Professional server setup, product installation, and deployment with full configuration.
From $99Not on the list?
Tell us the job. If it's in our lane (infrastructure, email, Python/Django, Microsoft 365 security, automation, scraping and data pipelines) we'll scope it, research anything we haven't done before, and deliver it. We'd rather learn a new tool than hand you off.
Describe your projectSecurity Research
7 bundles, 31 artifacts. Detections, hardening guides, IR runbooks. Reproduced in our own lab. No paywall.
How AiTM phishing actually works
The attack in plain English, mapped to ATT&CK, and which control kills which step. Read this first.
Read it DetectionsThree Sentinel KQL queries that catch it
Session replay. Hosting-ASN sign-in. Persistence chaining. Tested in real tenants. False positives documented.
Browse detections MitigationsThe CA policies that actually break AiTM
Five Conditional Access policies. The right rollout order. Break-glass setup. The control that takes the attack class off the table.
Read the guideLexlabMTA & Relay SMTP
Dedicated-IP SMTP for senders who need control over their own reputation. Your IP, your domain, SPF/DKIM/DMARC configured and monitored, blacklist watch built in. For high-volume application email, outbound campaigns, and teams moving off shared senders.
LexlabMTA Starter
For apps and senders that need a dedicated IP with managed authentication and monitoring.
- Dedicated IP allocated to your account
- SMTP + HTTP API access
- SPF, DKIM, DMARC pre-configured
- Real-time delivery dashboard
LexLab Relay SMTP
Relay-grade SMTP on a dedicated IP and domain. Unlimited sending, advised at 20K/day for long-term deliverability.
- 1 Dedicated IP
- 1 Domain included
- Unlimited sending (advised 20K/day)
- Setup within 24 hours
LexlabMTA VDS-50K
For high-traffic apps with sustained transactional volume.
- Dedicated VDS with reserved IP block
- SMTP + HTTP API access
- SPF, DKIM, DMARC managed across the IP block
- Real-time delivery dashboard
LexLab Relay Custom
Need more volume, IPs, or a non-standard setup? We build the plan around your requirements.
- Custom dedicated IP allocation
- Custom domain configuration
- Volume tailored to your needs
- Priority onboarding
Free Tools
Use them for free. No account needed.
DNS/SMTP Health Checker
Scan SPF, DKIM, DMARC, MX records, and SMTP for any domain.
Open DNS/SMTP Health CheckerMX Lookup
Look up a domain's MX records and identify the mail provider behind any address.
Open MX LookupTools
Software we built. Now yours.
BitM Shield
Debounce Email Validator - Professional
Email Sorter Pro
B2B Prospecting Toolkit
VPS & RDP Hosting
Linux VPS and Windows RDP servers with full admin access, deployed in minutes. From $14.99/month.