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#smtp
SMTP & infrastructure
Choosing an SMTP Relay Service: What Actually Matters
When to use an SMTP relay vs an API, what to look for, and how to migrate without breaking your existing app.
Igor PetrovJun 8, 20266 min
API & developersEmail API vs SMTP: Which Should Your App Use?
A clear comparison of sending email over an HTTP API versus SMTP — speed, features, reliability and when to pick each.
Mark TihonovMay 12, 20266 min
SMTP & infrastructureEmail Rate Limiting: Why Throttling Protects Deliverability
Sending too fast looks like an attack to mailbox providers. Here is how throttling and rate limits keep your mail flowing.
Igor PetrovApr 22, 20266 min
SMTP & infrastructureHow an Email Sending Queue Works
Why serious email goes through a queue, how retries and backoff work, and what that means for your app.
Igor PetrovMar 25, 20266 min