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A go-to resource on best practices for email security, anti-spam trends, product updates and everything in between.

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Diagnosing SMTP 5xx and 4xx Error Codes in Transactional Email

7 min read

When transactional email fails, the first useful clue is often the SMTP response code. These three-digit codes tell you whether the receiving server rejected the message permanently, deferred it temporarily, …

Read post: Diagnosing SMTP 5xx and 4xx Error Codes in Transactional Email

Industry

Why Gmail Sends Your Transactional Emails to Spam (and How to Fix It)

6 min read

Transactional email should be the easiest email to deliver. Users ask for it, expect it, and often need it immediately. Password resets, signup confirmations, receipts, billing alerts, and security notifications …

Read post: Why Gmail Sends Your Transactional Emails to Spam (and How to Fix It)

Industry

Choosing the Right Sending Method: SMTP vs API for Transactional Email

6 min read

Choosing how to send transactional email is not just an implementation detail. It affects reliability, observability, scalability, and how well your product handles critical workflows like password resets, receipts, billing …

Read post: Choosing the Right Sending Method: SMTP vs API for Transactional Email

Industry

Tools to Test Transactional Email Deliverability

6 min read

Transactional email is infrastructure. Password resets, account alerts, receipts, signup confirmations, and billing notices only do their job if they reach the inbox quickly and reliably. That is why deliverability …

Read post: Tools to Test Transactional Email Deliverability

Industry

SMTP vs API for Transactional Email: Which Should You Use?

6 min read

When you send transactional email, the delivery method shapes more than implementation. It affects reliability, observability, speed, debugging, and how well your system handles growth. For simple applications, either SMTP …

Read post: SMTP vs API for Transactional Email: Which Should You Use?

Industry

Key Components of a Transactional Email

6 min read

Transactional emails do real work. They help users reset passwords, confirm purchases, verify accounts, review invoices, and respond to security events. When these emails fail, product workflows break. That is …

Read post: Key Components of a Transactional Email

Industry

Troubleshooting Common MailChannels Setup Errors

6 min read

Getting started with MailChannels is usually straightforward, but small configuration mistakes can still break critical email workflows. A misconfigured SMTP port, missing authorization header, bad DNS record, or TLS mismatch …

Read post: Troubleshooting Common MailChannels Setup Errors

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