Email Template Size: Width, Height, Images and Gmail Clipping
6 min readChoose email template dimensions that work on phones and desktops. Understand 600px layouts, image sizing and the HTML that causes Gmail clipping.
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Build more reliable email and SMS workflows with practical MailSlurp tutorials, implementation guides, and production-ready testing advice.
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Markdown Headers and Titles: H1-H6 Syntax and Examples
5 min readWrite Markdown headers and titles with H1-H6 examples, underline-style headings, GitHub section links, and fixes for headings that do not render.
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What 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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Getting 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!
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SMTP & APIsCC 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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When 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.
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DeliverabilityTips 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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Hugo 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.
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SMTP & APIsWho 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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MailSlurp guidesWhat kinds of headers should I set to make a website secure?
3 min readHow can content security policies and X Frame Options enable more secure websites and services.
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DeliverabilityWhat Is SMTP? Protocol Basics, Commands, and Modern Email Delivery
3 min readSMTP (Simple Mail Transfer Protocol) is the internet standard for email submission and transfer. Learn commands, ports, and where SMTP fits in modern stacks.
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SMS & OTPWhat Is SMS Authentication? Security Tradeoffs and Safer MFA Design
3 min readSMS authentication uses one-time codes sent by text message. Learn how it works, where it fails, and how to design safer MFA flows.
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