How to Send Email in Swift (SMTP & API)

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

Your options in Swift

Use an SMTP library like SwiftSMTP, or URLSession to call an email 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.