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Connect Resend

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TL;DR
  • Host smtp.resend.com, port 465 with SSL or 587 with STARTTLS.
  • Username is literally resend; the password is a Resend API key.
  • Verify your sending domain in Resend before connecting.
Setting Value
Host smtp.resend.com
Port 465 (turn on Use secure (TLS/SSL)) or 587 (leave it off, STARTTLS is used)
Username resend
Password A Resend API key

Before you send

Section titled “Before you send”
  1. Add and verify your domain in Resend.
  2. Create an API key with sending access.
  3. Use an address on the verified domain as your From address in FlowSend.

Source: Resend’s SMTP guide.