Notes on deliverability, templates, and the API.
Field notes on shipping email: webhooks, bounces, and the parts of the API that don't show up in the quickstart.
- transactional
Write verification emails Gmail can copy
Write a verification email with one code at the top of the text and HTML. Gmail's Copy code button is a reported app behavior, not a published sender rule.
Read post - deliverability
Why Copy-Paste DNS Records Stall Domain Setup
Copy-paste DNS records stall email domain setup through registrar field quirks, long DKIM values, and silent waits. See how a connected provider avoids them.
Read post - deliverability
Email bounce back: hard bounce or soft bounce
A hard bounce is permanent and a soft bounce is temporary. Read the SMTP code, stop sending to dead addresses, and see how Samva suppresses them.
Read post - deliverability
Why are my emails going to spam? How to fix it
Why emails go to spam and how to fix it: tell delivery failures from spam placement, then check authentication, bulk-sender rules, audience, and content.
Read post - deliverability
What Is an Email Suppression List? How It Works
Understand why email addresses are suppressed, how suppression differs from unsubscribe, and what to check before removing a block.
Read post - deliverability
How to Warm Up a New Email Domain: A Schedule
Learn how to warm up a new email domain, build an email warmup schedule, and monitor sender reputation before increasing your sending volume.
Read post - deliverability
Gmail BIMI Logos and Verified Checkmarks
Learn what Gmail requires for BIMI brand logos, why its verified checkmark needs a VMC, and how to troubleshoot DNS, SVG, and certificate evidence.
Read post - compliance
One-click unsubscribe (RFC 8058) explained
Set List-Unsubscribe and List-Unsubscribe-Post, then honor one POST, for Gmail and Yahoo bulk senders. Transactional mail such as password resets stays exempt.
Read post - transactional
Transactional vs Marketing Email Explained
What separates transactional from marketing email, and why the split shapes consent, deliverability reputation, sending domains, and suppression lists.
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