How to Send Email in PHP (SMTP & API)

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

Your options in PHP

PHPMailer is the go-to for SMTP; for deliverability at scale, send via an API and process webhooks. (PHPMailer or Symfony Mailer for SMTP, or cURL to an API.)

Make it land, not bounce

• Authenticate your domain with SPF, DKIM and 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, plus 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.