Send an email using the user's chosen default email app (e.g. Mail, Gmail, Outlook etc.) instead of using MFMailComposeViewController that requires the Mail app to be setup with an account

mailto.swift

let address = "[email protected]"
let subject = "AwesomeApp Feedback"

// Example email body with useful info for bug reports
let body = "\n\nApp Version: \(appVersion)\nDevice: \(deviceType)\niOS: \(osVersion)"

// Build the URL from its components
var components = URLComponents()
components.scheme = "mailto"
components.path = address
components.queryItems = [
      URLQueryItem(name: "subject", value: subject),
      URLQueryItem(name: "body", value: body)
]

guard let url = components.url else {
    NSLog("Failed to create mailto URL")
    return
}

UIApplication.shared.open(url) { success in
  // handle success or failure
}