Backscatter: The Bounces You Never Sent
When spammers forge your domain as their envelope sender, the bounces come to you. What backscatter is, why it happens, and how to stop causing and receiving it.
#Infrastructure
7 articles with this tag
DNSSEC for Email Operators: Worth It, and How Not to Break Everything
Every email trust decision resolves through DNS, and DNSSEC is what makes those answers tamper-proof. What it buys email, what DANE requires, and safe operations.
Duplicate Sends: Idempotency in Email Pipelines
Everyone has received the same email twice. The retry loops, queue semantics, and race conditions that cause duplicates, and the idempotency patterns that stop them.
DNS for Email: The Records, TTLs, and Chains That Break Mail
Email is a DNS application. The full record inventory a sending domain needs, the TTL strategy for safe changes, and the misconfigurations that quietly break delivery.
SMTP Relay vs. API Sending: Architecture Trade-offs That Matter
Every sending platform offers SMTP relay and an HTTP API. The differences in latency, error handling, portability, and observability, and how to choose per workload.
Migrating ESPs Without Destroying Your Sender Reputation
Switching email providers resets your IPs, your DKIM keys, and every provider assumption about your traffic. A migration plan that carries your reputation across.
Why Your Transactional Emails Are Landing in Spam (And Mixing Them with Marketing Is The Reason)
Password resets going to spam? You're sending them from the same IP and domain as marketing campaigns. The four operational fixes that actually work.