Real infrastructure, documented results
Each case documents a specific infrastructure problem, the architecture deployed, and the verified outcome. Countries covered: 12. Industries: 12. Client identities withheld by request.
German E-Commerce Platform
ESP Migration to Dedicated PowerMTA Infrastructure
3.8M subscriber retailer migrated from shared infrastructure. Inbox placement recovered, cost reduced 62%.
Dutch SaaS Platform
Transactional Email That Survives Marketing Events
400K-user SaaS with 2FA codes averaging 13 min during campaigns. Isolation reduced delivery to 38 seconds.
French Lead Generation Agency
Cold Email Infrastructure Isolation and Reputation Recovery
14-client agency with cold outreach contaminating warm marketing. Per-client isolation prevents cross-account events.
UK Fintech Platform
Deliverability Recovery After Shared IP Blacklisting
FCA-regulated platform with complete delivery failure. Compliance email restored in 5 days; DMARC p=reject in 12.
Polish E-Commerce Group
IP Warming at Scale Across 6 Domains and 4 European ISPs
16 IPs warmed simultaneously across 6 brand domains through Black Friday. Zero blacklist events; HIGH reputation across all brands.
Healthcare SaaS Platform
HIPAA-Compliant Transactional Email Infrastructure
800K patient-facing messages moved off shared IP pool. TLS enforcement on every connection, Postmaster reputation HIGH within 6 weeks.
EdTech Platform
Multi-Inbox Architecture for University Whitelisting
2M learners across 40 countries. Dedicated infrastructure passing institutional IT whitelisting requirements at university recipients.
Fashion E-Commerce Brand
Reputation Recovery Through List Hygiene and Domain Transplant
1.4M list reduced to 180K engaged donors. Postmaster BAD to HIGH in 11 weeks; revenue per send up 340% on the smaller list.
Gaming Platform
Account Security Through Latency-First 2FA Email Infrastructure
12M users across 190 countries. Priority-tiered VMTAs and regional IPs cut 2FA delivery from 4.2s to 0.8s; account compromises down 44%.
Travel Platform
Booking Confirmation Infrastructure at Peak-Burst Volumes
4M booking confirmations per day moved off saturated shared relay. Median delivery 4.7 minutes to 23 seconds; cost down 41%.
National Non-Profit
Year-End Fundraising Recovery and Suppression Registry Rebuild
1.4M donor list rebuilt around 180K engaged donors. Suppression registry as single source of truth; +$3.4M raised vs prior year.
Legal Services Platform
Corporate Gateway Delivery for Court and Compliance Notifications
Court notifications and document delivery to corporate inboxes protected by Proofpoint and Mimecast. Trusted-sender enrollment, gateway acceptance from 71% to 99.6%.
Logistics Operator
Dual-Datacenter Shipment Notification Infrastructure for 28 Countries
800K notifications per day across 28 European countries. Dual-DC failover, per-country ISP throttle calibration, +22 NPS points.
Real Estate Platform
Relevance-as-Deliverability and Search-Lifecycle Modelling
4.1M subscribers reduced to 760K active searchers. 70% relevance-match threshold cut alert volume 37% while clicks rose to 22%.
Dutch Marketplace
Reputation Isolation Across Buyer, Seller, and Marketing Streams
500K sellers, 8M buyers. Per-seller DKIM delegation eliminated cross-stream contamination; €149K monthly dispute-cost reduction.
Recognise your situation in these cases?
The problems documented here — shared IP contamination, transactional disruption, cold email reputation bleed, blacklist events, ISP-specific failures — are the patterns we resolve regularly. Contact us for an assessment of your specific infrastructure.