Email designTailwind print styles: custom media query setup and real-world pitfalls
3 min readLearn how to add print-specific Tailwind classes, build clean PDF-friendly layouts, and avoid common print rendering issues.
Read guideEmail testing, deliverability, and API guides
Build more reliable email and SMS workflows with practical MailSlurp tutorials, implementation guides, and production-ready testing advice.
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Email design
MailSlurp guidesUnderstanding Email Size and Optimization Techniques
4 min readEmail sizes are fundamental for a few important reasons. One is security, and another is the performance of your email.
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Email designEmail Template Size Guide: Width, Height, and File-Weight Limits
7 min readChoose the right email template size for desktop and mobile. Learn width, height, image, and file-weight rules to avoid clipping and rendering issues.
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MailSlurp guidesMarkdown heading sizes: H1-H6 syntax, hierarchy, and best practices
3 min readLearn markdown heading syntax and heading sizes with practical examples for H1-H6, GitHub-style docs, and clean content structure.
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Email testingWhat Is an SMTP Server? Handshake, Relay Flow, Security, and Testing
3 min readAn SMTP server accepts outbound mail, routes it to destination domains, and handles delivery retries. Learn how the SMTP handshake works and how to run it safely in production.
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SMTP & APIsGetting Started with DotNET Core Cake Runner.
4 min readCreate custom builds for your .NET applications using Cake: a free open-source task runner for cross-platform automation in C#. Learn how with MailSlurp!
Read guideCC and BCC in SMTP: How Envelope Recipients and Headers Actually Work
4 min readUnderstand CC and BCC at SMTP level: RCPT TO vs message headers, privacy implications, and how to test recipient visibility safely.
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SMTP & APIsWhen to use mailto links: UX limits and fallback patterns
3 min readUnderstand the UX tradeoffs, encoding fragility, and fallback patterns for mailto links so you only rely on them when they deliver real value.
Read guideTips for Avoiding Spam Filters and Increasing Email Deliverability
3 min readMastering Email Filters: Boost your email deliverability and engagement rates by learning how to avoid the spam folder with these effective tips.
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SMS & OTPHugo responsive image srcsets optimize website performance.
3 min readUsing custom `render-image` layout partial in Hugo, learn how to serve responsive picture tags with source sets and webp conversion for images.
Read guideYes, you can add Gifs to emails! Just make sure the client supports it.
3 min readMaximize email engagement by adding GIFs! Discover the best places to find them, how to create and insert them, and transform videos into GIFs.
Read guideWho Invented Email? The Fascinating Story of Ray Tomlinson
4 min readAmerican Ray Tomlinson and Shiva Ayyaduari are both created with conceiving of and creating electronic mail or email.
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