MailSlurp resources
Email API, deliverability, and QA engineering blog - Page 18
Tactical writing for teams building reliable email and SMS workflows in development, CI, and production operations.
Posts
CC and BCC in SMTP: How Envelope Recipients and Headers Actually Work
Understand CC and BCC at SMTP level: RCPT TO vs message headers, privacy implications, and how to test recipient visibility safely.
Read more technicalWhen to use mailto links: UX limits and fallback patterns
Understand the UX tradeoffs, encoding fragility, and fallback patterns for mailto links so you only rely on them when they deliver real value.
Read more technicalTips for Avoiding Spam Filters and Increasing Email Deliverability
Mastering Email Filters: Boost your email deliverability and engagement rates by learning how to avoid the spam folder with these effective tips.
Read more technicalHugo responsive image srcsets optimize website performance.
Using custom `render-image` layout partial in Hugo, learn how to serve responsive picture tags with source sets and webp conversion for images.
Read more technicalYes, you can add Gifs to emails! Just make sure the client supports it.
Maximize email engagement by adding GIFs! Discover the best places to find them, how to create and insert them, and transform videos into GIFs.
Read more technicalWho Invented Email? The Fascinating Story of Ray Tomlinson
American Ray Tomlinson and Shiva Ayyaduari are both created with conceiving of and creating electronic mail or email.
Read more technicalWhat SMTP Port Should You Use? (Quick Answer + Checklist)
Get a fast answer to what SMTP port to use, plus secure port and TLS pairing guidance for production email delivery.
Read more technicalWhat kinds of headers should I set to make a website secure?
How can content security policies and X Frame Options enable more secure websites and services.
Read more technicalWhat Is SMTP? Protocol Basics, Commands, and Modern Email Delivery
SMTP (Simple Mail Transfer Protocol) is the internet standard for email submission and transfer. Learn commands, ports, and where SMTP fits in modern stacks.
Read more technicalWhat Is SMS Authentication? Security Tradeoffs and Safer MFA Design
SMS authentication uses one-time codes sent by text message. Learn how it works, where it fails, and how to design safer MFA flows.
Read more technicalWhat Is Single Sign-On (SSO) and How Does It Work?
Understand SSO architecture, user/session flow, and the security tradeoffs of centralizing authentication across applications.
Read more technicalWhat Is SAML? Identity Federation and SAML SSO Explained
Learn what SAML is, how SAML assertions work, and when to choose SAML vs OIDC for enterprise single sign-on integrations.
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