我无法通过它发送邮件。我在这个项目中使用 mailcore，我的代码如下所示

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        var smtpSession = MCOSMTPSession()
        smtpSession.hostname = "smtp.gmail.com"
        smtpSession.username = "user@gmail.com"
        smtpSession.password = "password"
        smtpSession.port = 465
        smtpSession.authType = MCOAuthType.saslPlain



      smtpSession.connectionType = MCOConnectionType.TLS
        smtpSession.connectionLogger = {(connectionID, type, data) in
            if data != nil {
                if let string = NSString(data: data!, encoding: String.Encoding.utf8.rawValue){
                    NSLog("Connectionlogger: \(string)")
                }
            }
        }

        var builder = MCOMessageBuilder()
        builder.header.to = [MCOAddress(displayName: "aaa", mailbox: "user2@gmail.com")]
        builder.header.from = MCOAddress(displayName: "aaa", mailbox: "user@gmail.com")
        builder.header.subject = "My message"
        builder.htmlBody = "Yo Rool, this is a test message!"

        let rfc822Data = builder.data()
        let sendOperation = smtpSession.sendOperation(with: rfc822Data)
        sendOperation?.start { (error) -> Void in
            if (error != nil) {
                NSLog("Error sending email: \(error)")
            } else {
                NSLog("Successfully sent email!")
            }
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

这是我收到错误的代码

2017-02-09 15:55:32.545008 mail[4153:1180194] Connectionlogger: 220 smtp.gmail.com ESMTP f3sm27649397pga.34 - gsmtp 2017-02-09 15:55:32.554899 mail[4153:1180194] Connectionlogger: EHLO iPhone 2017-02-09 15:55:32.792542 mail[4153:1180194] Connectionlogger: 250-smtp.gmail.com at your service, [183.83.32.47]

250-SIZE 35882577

250-8BITMIME

250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH

250-ENHANCEDSTATUSCODES

250-PIPELINING

250-CHUNKING

250 SMTPUTF8 2017-02-09 15:55:32.797741 mail[4153:1180194] Connectionlogger: AUTH PLAIN ODg4Ni5rLnNpdmFAZ21haWwuY29tADg4ODYuay5zaXZhQGdtYWlsLmNvbQA4ODg2MjI4NzY= 2017-02-09 15:55:33.228330 mail[4153:1180194] Connectionlogger: 535-5.7.8 Username and Password not accepted. Learn more at

535 5.7.8 https://support.google.com/mail/?p=BadCredentials f3sm27649397pga.34 - gsmtp 2017-02-09 15:55:33.231723 mail[4153:1180132] Error sending email: Optional(Error Domain=MCOErrorDomain Code=5 "Unable to authenticate with the current session's credentials." UserInfo={NSLocalizedDescription=Unable to authenticate with the current session's credentials.})

它显示这样的错误，但我的凭据是正确的。

有人知道这个的解决方案吗？

最佳答案

google 使用 OAuth2 进行身份验证。您必须为 mailcore2 实现 OAuth2 - 请参阅 wiki https://github.com/MailCore/mailcore2/wiki/Implementing-OAuth-2.0

或者您必须进入您的 google 帐户 session ，并在安全设置中允许“不太安全的应用程序”连接 - 这将重新启用您在上面代码中使用的 TLS 用户名/密码身份验证。

关于ios - 无法在 swift 3.0 中使用 smtp 服务器发送邮件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42134382/