Engineering & Product Blog
In-depth technical tutorials, deliverability architectures, and best practices from the Mailofly team.
Clean Before You Send: Mailprob Now Verifies and Cleans Contact CSVs Directly Inside Campaigns
Mailofly TeamIntroducing Mailofly CLI: Send Emails from Your Terminal
Meet the Mailofly CLI: send emails from your terminal, manage domains and templates, trigger automations, and add email notifications to your CI/CD workflows.
Mailofly TeamMailofly Automations: Build Automated Email Workflows
Build automated email workflows with Mailofly. Send personalized welcome emails, automate customer onboarding, and trigger follow-ups using events, delays, and conditions.
Mailofly Team
SPF, DKIM, and DMARC: The Complete Guide to Email Authentication in 2026
Master the three pillars of email authentication: SPF, DKIM, and DMARC. Learn how to configure your DNS records, satisfy Google and Yahoo sender requirements, and keep your emails out of the spam folder.
Mailofly TeamSMTP Port 587 vs. 465 vs. 25: Which Port Should You Use in 2026?
A clear breakdown of SMTP ports 587, 465, 25, and 2525. Learn the difference between STARTTLS and implicit SSL, why port 25 is blocked, and how to choose the right port.
Mailofly TeamSMTP vs. Email API: The Complete Developer Guide for 2026
A comprehensive comparison of SMTP vs REST Email APIs. Compare latency, delivery speed, setup complexity, serverless reliability, and learn which protocol fits your tech stack.
Mailofly Team