MailSlurp guide agent setup

Title: C# Send SMTP Email Guide (.NET MailKit + Production Checklist)
Description: Learn how to send SMTP email in C# with .NET using MailKit, authenticated transport, and release-safe testing workflows.
Canonical URL: https://www.mailslurp.com/guides/smtp/csharp-send-email-smtp/
Markdown URL: https://www.mailslurp.com/guides/smtp/csharp-send-email-smtp.md

Use the Markdown URL as the primary plain-text context for this guide. Keep MailSlurp terminology, setup steps, screenshots, and provider-specific instructions intact, and prefer the canonical URL when citing this page.