Email Service - Authenticated SMTP submission now available in beta

You can now send emails through Cloudflare Email Service using authenticated SMTP submission on smtp.mx.cloudflare.net:465 . SMTP joins the REST API and the Workers binding as a third way to send transactional email — useful for existing applications that already speak SMTP and language-native SMTP libraries (Nodemailer, smtplib , PHPMailer, JavaMail). Setting Value Host smtp.mx.cloudflare.net Port 465 (implicit TLS) AUTH PLAIN or LOGIN Username api_token Password A Cloudflare API token (account-owned or user-owned) with Email Sending: Edit Submissions enter the same delivery pipeline as the REST API and Workers binding: identical limits , automatic DKIM and ARC signing, and shared dashboard logs. Send your first email with a single command: curl --ssl-reqd \ --url "smtps://smtp.mx.cloudflare.net:465" \ --user "api_token:" \ --mail-from "[email protected]" \ --mail-rcpt "[email protected]" \ --upload-file mail.txt Refer to the SMTP reference for authentication details, response codes, and language-specific examples.