Send and receive email with the MailSlurp GraphQL API
3 min readUse MailSlurp's GraphQL email API to create inboxes, send messages, receive email, and explore queries and mutations in the browser playground.
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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RNMailSlurp field guide
SMTP & APIsReformat .NET core projects using Resharper CLI tools
3 min readEasily format C# code in .NET Core projects with the free Resharper Command-Line Tool. Learn how to install and use it with this tutorial.
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Read Email in Ruby and Rails Tests with MailSlurp
4 min readCreate a private test inbox, receive email in Ruby, and extract verification codes for Rails, RSpec, and integration tests with the MailSlurp Ruby SDK.
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PowerShell Send Email SMTP Guide (Send-MailMessage, API, and Testing)
6 min readSend email from PowerShell with Send-MailMessage, SMTP auth, multiple recipients, attachments, API sends, and MailSlurp receive-side testing.
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PHPMailer Tutorial: Send Email with PHP via SMTP (Production Ready)
3 min readLearn PHPMailer setup with Composer, secure SMTP configuration, HTML + text sending, attachments, and troubleshooting for production PHP apps.
Read guideOAMailSlurp field guide
SMTP & APIsOverride appsettings.json with environment variables in .NET
6 min readOverride nested appsettings.json values in ASP.NET Core with portable environment names, optional prefixes, startup validation, and safer secret handling.
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SMS & OTPOTP SMS Verification Tutorial: Build, Verify, and Test End to End
3 min readImplement SMS OTP verification with a secure backend flow, resend limits, and deterministic test coverage for signup and login journeys.
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AuthenticationMulti-factor Authentication (MFA): All You Need to Know
4 min readMulti-Factor Authentication: Increasing Digital Security for Users. Learn how MFA works and its benefits in protecting against cyberattacks.
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AuthenticationMulti-Factor Authentication (MFA) requires multiple verifications to access an account.
4 min readEnhance Your Security with Multi-Factor Authentication: Learn about the benefits, types, and working concept of this crucial identity verification method.
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DeliverabilityMTA-STS and TLS-RPT: How to Harden SMTP Transport Security
3 min readDeploy MTA-STS and TLS reporting to reduce downgrade/MITM risk for SMTP delivery and monitor transport failures across receiving domains.
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SMTP & APIsMailSlurp JavaScript SDK Quickstart
5 min readCreate inboxes, send email, receive messages, and test email workflows with the official MailSlurp JavaScript SDK.
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DeliverabilityKeeping Your Email List Clean: Avoiding Bounces and Complaints
3 min readPrevent Email Bounces and Protect Your Spam Ranking with MailSlurp's Free Email Validator Tool. Discover effective ways to clean your email lists.
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