Forensic analysis of the email industry. Decoded in real-time.
Compare top mail transfer agent software for 2025. From Postfix and Exim to modern cloud-native engines like KumoMTA. Benchmarks, architecture, and selection guide.
Compare top open source MTAs (Postfix, Exim, OpenSMTPD) for 2025. Learn the hidden costs of self-hosting, Docker deployment strategies, and when to use a smart relay.
What is a Mail Transfer Agent (MTA)? Learn how MTAs route email, compare Postfix vs. KumoMTA performance, and decide between self-hosting or cloud APIs.
Microsoft is killing the IIS SMTP service in Windows Server 2025. Here is the modern guide to running a Mail Transfer Agent on Windows or migrating to a smart host.
Compare top Linux Mail Transfer Agents (Postfix, Exim, KumoMTA) for 2026. Learn architecture, performance benchmarks, and when to replace your local MTA with an API.
Why are your emails going to spam? It's likely not your subject line. Debug SPF/DKIM failures, bad IP reputation, and aggressive filtering with this technical guide.
Understand the mechanics of spam email filters, from UBE definitions to reputation scoring. Learn to debug SMTP blocks, fix technical triggers, and secure delivery.
Spamhaus explained for developers. Understand SBL, XBL, PBL, and 127.0.0.x return codes, why your IP is listed, and how to fix deliverability issues.
Don't confuse SEO metrics with inbox placement. A developer's guide to the top 5 spam score checkers, interpreting the data, and fixing reputation issues.
A technical deep dive into how mail spam filters work, from Bayesian analysis to Rspamd configuration. Learn to secure inbound streams and optimize outbound deliverability.
Stop playing whack-a-mole with junk mail. A technical guide to blocking spam via DNS backscatter protection, advanced alias routing, and regex filters.
Don't rely on simple keyword scans. This guide for developers breaks down how modern email spam checkers work, from SMTP handshakes to seed list testing.
Don't just find the spam folder. Learn to check email headers, analyze spam scores, and debug deliverability issues with forensic precision.
A developer-focused guide to CAN-SPAM compliance. Learn the 7 core requirements, the $53,088 penalty risks, and how to automate opt-outs via API.
How we parse inbound emails and route them to webhooks to build powerful two-way workflows.
Overage fees are where legacy providers make their real money. Rates can be 10x your plan rate. Here's how to avoid the trap.
SparkPost controls the inbox for the Fortune 500. But if you aren't spending $20k/year, you are a second-class citizen.
SendGrid bans accounts without warning. Transmit gives you isolated reputation and full control with managed or BYOK options.
The era of 'Black Box' email providers is over. Discover why fast-growing SaaS companies are moving to 'Bring Your Own Keys'.
Resend has great DX but lacks warmup, reputation isolation, and BYOK. Here's why that matters at scale.
Postmark requires manual approval for Dedicated IPs. Transmit gives you Day 1 access via AWS SES. Here is the architecture comparison.
Why we prioritize IAM roles over access keys for connecting your AWS infrastructure securely.
Mailgun's interface is rotting, and their support is non-existent. Learn how to migrate your reputation to AWS SES without downtime.
Loops charges per contact. Transmit charges per email. For most SaaS companies, that means 5-10x savings.
Why sending 1M emails costs 10x more than 100k on legacy providers. The economics of email and how to escape the trap.
Mandrill hasn't released a major feature in years. You are paying a 'Mailchimp Tax' for a product on life support.
They built a 'Roach Motel' for your HTML. Easy to get in, impossible to get out. Here are the keys to the exit door.
Traditional email providers operate in a 'Fog of War'. See how the 'Transparency Report' gives you raw, unfiltered access.
Dedicated IPs cost AWS $25/mo. Legacy providers charge $90+ or gate them behind enterprise plans. Here's the playbook.
The definitive guide to AWS SES wrappers: Transmit vs Sendy vs Sidemail. Don't build your own. Don't run PHP scripts.
Learn how we built an automated reputation management system on top of Amazon SES to ensure perfect deliverability.
Your SendGrid account is under review. You have 24 hours. Here is the emergency protocol to migrate your reputation to AWS SES immediately.
Choose a thread from the intelligence feed to begin your forensic analysis.