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Engineering deep dives.

Architecture, infrastructure, and implementation guides from the team building Pingram notification APIs.

Sec. 01Engineering

Engineering posts

Oct 16, 2026

US SMS Carrier Filtering Mechanisms and How to Resolve Each (2026)

Common US SMS carrier filters such as: 10DLC, not routable, unreachable, undeliverable, expired, 30034, 30032, 30963, with recommendations for each.

5 min read

Oct 14, 2026

10DLC vs Short Code vs Toll-Free vs Sender ID vs. National Comparison (2026)

How local 10DLC, national long numbers, toll-free, short codes, and alphanumeric sender IDs differ, and which one to send from.

8 min read

Oct 9, 2026

Separating Transactional and Marketing Email Streams: Best Practice (2026)

When to separate marketing email from receipts and password resets, and the practical steps: address, preferences, IPs, and clean lists.

7 min read

Oct 7, 2026

Resend vs Postmark vs Amazon SES vs SendGrid (2026)

How to choose among Resend, Postmark, Amazon SES, and SendGrid once you are paying, and when Pingram is the better fit.

7 min read

Oct 6, 2026

SendGrid Pricing (2026)

SendGrid pricing in 2026 is an email-volume bill plus a second Marketing Campaigns bill. The caps that change the price are the trial, the 50,000-email step, and the dedicated IP.

6 min read

Oct 5, 2026

10DLC Throughput Limit Low Volume Campaign (2026)

The 10DLC throughput limit on a low volume campaign: T-Mobile’s daily cap, AT&T’s per-minute cap, and why vetting does not raise it.

6 min read

Oct 5, 2026

Cheapest Transactional Email for Low Volume (2026)

The cheapest transactional email for low volume is the option whose monthly bill is zero or a few cents, not the lowest rate on a plan you will not fill.

7 min read

Sep 27, 2026

Can Claude Send Emails? Automate Newsletters with MCP

Connect Claude, ChatGPT, or Grok Bot to Pingram MCP, draft a product-update newsletter, choose raw emails or a live filter, then review and schedule the send in the dashboard.

8 min read

Sep 18, 2026

Automate Newsletters from JavaScript with a Broadcast API

Send product updates and newsletters from Node.js: sync users, personalize templates with properties, then create, schedule, and send email broadcasts through the Pingram API.

10 min read

Sep 15, 2026

Best Mailgun Alternatives: Email API Providers Compared in 2026

Five Mailgun alternatives compared for 2026: Pingram, Mailtrap, Twilio SendGrid, Postmark, and Amazon SES — pricing, log retention, setup, and which teams each one actually fits.

11 min read

May 1, 2026

Twilio Alternative for SMS (2026) | Pingram

A practical Twilio SMS alternative comparison: Pingram, Plivo, Klaviyo, Sinch, and Twilio compared on cost, A2P 10DLC, and setup complexity.

14 min read

Apr 25, 2026

v0: Send and Receive SMS Notifications from Your v0 App

Learn how to send and receive SMS notifications in your Vercel v0 application using Pingram. Includes security best practices and webhook setup for inbound SMS.

8 min read

Apr 20, 2026

What Is awstrack.me? Fix SES Email Notifications (2026)

awstrack.me is an Amazon AWS tracking domain embedded in SES emails. Learn what it is, whether it is safe, why it gets blocked, and how to fix it.

8 min read

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