https://usenotix.dev/blog Articles on email deliverability, transactional email, SMS and one-time codes. en Mon, 12 Oct 2026 05:30:22 GMT https://usenotix.dev/blog/transactional-vs-marketing-email https://usenotix.dev/blog/transactional-vs-marketing-email Mon, 12 Oct 2026 00:00:00 GMT Apply the primary purpose test, then route transactional and marketing email through separate paths on one platform with shared suppression lists. https://usenotix.dev/blog/list-hygiene-practices https://usenotix.dev/blog/list-hygiene-practices Sun, 11 Oct 2026 00:00:00 GMT Protect email deliverability with a list hygiene checklist that prevents bad signups, tracks bounce and complaint thresholds, and automates routine cleanup. https://usenotix.dev/blog/bounce-reason-codes https://usenotix.dev/blog/bounce-reason-codes Sat, 10 Oct 2026 00:00:00 GMT Learn how 4xx and 5xx replies shape retry or suppression decisions, which DSN fields to inspect, and how SMTP transcripts reveal why email bounced. https://usenotix.dev/blog/api-rate-limiting-strategies https://usenotix.dev/blog/api-rate-limiting-strategies Fri, 09 Oct 2026 00:00:00 GMT Implementation first API rate limiting for engineers. Map algorithms to burst, memory, and latency. Ship 429/RateLimit headers and load test. https://usenotix.dev/blog/sms-deliverability https://usenotix.dev/blog/sms-deliverability Thu, 08 Oct 2026 00:00:00 GMT Stop trusting 'sent.' Measure SMS deliverability with DLRs, diagnose failures, and apply prioritized fixes for marketing and engineering teams. https://usenotix.dev/blog/ip-warming https://usenotix.dev/blog/ip-warming Wed, 07 Oct 2026 00:00:00 GMT Operations-first IP warming for deliverability teams. Use 1.5x stage increases with 2–4 day holds, monitor 0.1% complaints and ~2% bounces. https://usenotix.dev/blog/improve-email-deliverability https://usenotix.dev/blog/improve-email-deliverability Tue, 06 Oct 2026 00:00:00 GMT A practical, engineering-aware checklist for marketers and devs: configure SPF/DKIM/DMARC, enforce double opt-in, warm up sends. https://usenotix.dev/blog/email-gdpr-compliance https://usenotix.dev/blog/email-gdpr-compliance Mon, 05 Oct 2026 00:00:00 GMT Operational guide that turns GDPR rules into an eight item checklist so marketers can prove consent, automate suppression, and avoid fines. https://usenotix.dev/blog/smtp-relay-setup https://usenotix.dev/blog/smtp-relay-setup Sun, 04 Oct 2026 00:00:00 GMT Practical SMTP relay setup for IT teams: copy paste Postfix configs, Microsoft 365 and Google relay steps, abuse hardening, and a 9 step checklist. https://usenotix.dev/blog/payment-receipt-emails https://usenotix.dev/blog/payment-receipt-emails Sat, 03 Oct 2026 00:00:00 GMT Get four ready-to-send receipt templates plus webhook safe delivery patterns, idempotency guidance, and resend best practices for dev and ops teams. https://usenotix.dev/blog/sms-api-integration https://usenotix.dev/blog/sms-api-integration Fri, 02 Oct 2026 00:00:00 GMT Developer playbook to integrate an SMS API from credentials to delivery. Secure OTP alternatives, webhook testing, and a unified email+SMS example. https://usenotix.dev/blog/email-api-pricing https://usenotix.dev/blog/email-api-pricing Thu, 01 Oct 2026 00:00:00 GMT Developer playbook to email API pricing. See why the $0.10/1,000 headline misleads, which add-ons raise your bill, and how Notix reduces hidden costs. https://usenotix.dev/blog/password-reset-emails https://usenotix.dev/blog/password-reset-emails Wed, 30 Sep 2026 00:00:00 GMT Three ready password reset email templates for developers and PMs, with an OWASP-aligned engineering checklist and fixes for common deliverability problems. https://usenotix.dev/blog/sms-api-cost https://usenotix.dev/blog/sms-api-cost Tue, 29 Sep 2026 00:00:00 GMT Estimate your SMS API cost with a six-step checklist for developers and procurement teams, covering message segments, number rentals and carrier surcharges. https://usenotix.dev/blog/notification-architecture https://usenotix.dev/blog/notification-architecture Mon, 28 Sep 2026 00:00:00 GMT Notification architecture for engineers sending a million notifications in five minutes: Kafka versus SNS and SQS, Redis SETNX idempotency, render at ingest. https://usenotix.dev/blog/sms-scheduling https://usenotix.dev/blog/sms-scheduling Sun, 27 Sep 2026 00:00:00 GMT Four practical ways businesses schedule SMS, and how to avoid blocked or deferred deliveries with timezone handling and quiet-hour checks. https://usenotix.dev/blog/otp-verification-email https://usenotix.dev/blog/otp-verification-email Sat, 26 Sep 2026 00:00:00 GMT Standards-backed email OTP verification for developers: secure token logic, single-use codes, 5–15 minute TTLs, rate limiting and deliverability of the code. https://usenotix.dev/blog/email-campaign-management https://usenotix.dev/blog/email-campaign-management Fri, 25 Sep 2026 00:00:00 GMT Operations-first email playbook: prioritize deliverability with pre send gates and strict list hygiene to keep mail in inboxes. https://usenotix.dev/blog/sms-sender-id https://usenotix.dev/blog/sms-sender-id Thu, 24 Sep 2026 00:00:00 GMT A regulator-first guide for ops and engineering to SMS sender ID rules from ACMA, ComReg and Ofcom, and the 4–12 week provisioning windows to plan around. https://usenotix.dev/blog/email-verification-link https://usenotix.dev/blog/email-verification-link Wed, 23 Sep 2026 00:00:00 GMT A developer explainer of email verification links: how single-use tokens work, six rules for secure links, troubleshooting, and sending them with Notix. https://usenotix.dev/blog/3-order-confirmation-email-checks-for-marketing-dev-teams https://usenotix.dev/blog/3-order-confirmation-email-checks-for-marketing-dev-teams Tue, 22 Sep 2026 00:00:00 GMT Marketing and Dev playbook for order confirmation emails: 3 operational checks plus copy and deliverability steps to cut support tickets. https://usenotix.dev/blog/dedicated-ip-email https://usenotix.dev/blog/dedicated-ip-email Sun, 20 Sep 2026 20:49:26 GMT Decide if a dedicated sending IP fits your email team. Confirm the real egress IP, follow a warm-up checklist, monitor reputation, or use Notix to cut ops. https://usenotix.dev/blog/dunning-emails https://usenotix.dev/blog/dunning-emails Sun, 20 Sep 2026 00:00:00 GMT Recover failed payments with dunning emails: a 4–5 email cadence, branching on decline codes, idempotent state machines and testing it all in a sandbox.