How to Send Email in ASP.NET (SMTP & API)

Here is how to send email in ASP.NET so it reaches the inbox.

Your options in ASP.NET

Use MailKit or System.Net.Mail for SMTP, or HttpClient for an API.

Make it land

• Authenticate your domain (SPF, DKIM, DMARC).
• Send from a dedicated, warmed IP.
• Handle bounces and complaints via webhooks.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, a REST API, and an AI watching deliverability — and it welcomes senders SES, SendGrid and Mailchimp reject, from $8. Run the free checker or see plans.