我正在尝试在带有附件的codeigniter上发送电子邮件。

我总是成功收到电子邮件。但是，我从未收到带有附件的文件。以下是代码，非常感谢所有评论。

    $ci = get_instance();
    $ci->load->library('email');
    $config['protocol'] = "smtp";
    $config['smtp_host'] = "ssl://smtp.gmail.com";
    $config['smtp_port'] = "465";
    $config['smtp_user'] = "test@gmail.com";
    $config['smtp_pass'] = "test";
    $config['charset'] = "utf-8";
    $config['mailtype'] = "html";
    $config['newline'] = "\r\n";

    $ci->email->initialize($config);

    $ci->email->from('test@test.com','Test Email');
    $list = array('test2@gmail.com');
    $ci->email->to($list);
    $this->email->reply_to('my-email@gmail.com','Explendid Videos');
    $ci->email->subject('This is an email test');
    $ci->email->message('It is working. Great!');

    $ci->email->attach( '/test/myfile.pdf');
    $ci->email->send();

解决方法

program SendMailWithCalendarRequest; 
{$APPTYPE CONSOLE} 

uses 
  IdSMTP,Classes,DateUtils,IdMessage,SysUtils; 

 procedure SendCalendarRequest; 
 var 
  SMTP        : TIdSMTP; 
  MailMessage : TIdMessage; 
 begin 
   SMTP:= TIdSMTP.Create(nil); 
   MailMessage := TIdMessage.Create(nil); 
   try 
     SMTP.Host := 'smtp.mailserver.com'; 
     SMTP.Port := 25; 
     SMTP.Username := 'the account'; 
     SMTP.Password := 'the password'; 
     SMTP.AuthType := satDefault; 
     MailMessage.From.Address := 'mail@server.com'; 
     MailMessage.Recipients.EMailAddresses := 'the Recipient'; 
     MailMessage.Subject := 'Send calendar'; 
     MailMessage.Body.Add('BEGIN:VCALENDAR'); 
     MailMessage.Body.Add('VERSION:1.0'); 
     MailMessage.Body.Add('BEGIN:VEVENT'); 
     MailMessage.Body.Add('ORGANIZER:MAILTO:'+SenderMail); 
     MailMessage.Body.Add('DTStart:'+FormatDateTime('YYYY-DD-DD',Now)); 
     MailMessage.Body.Add('DTEnd:'+FormatDateTime('YYYY-DD-DD',Tomorrow)); 
     MailMessage.Body.Add('Location;ENCODING=QUOTED-PRINTABLE: My home'); 
     MailMessage.Body.Add('UID:'+FormatDateTime('YYYY-DD-DD',Now)+FormatDateTime('YYYY-DD-DD',Tomorrow)); 
     MailMessage.Body.Add('SUMMARY:Appointment Reminder'); 
     MailMessage.Body.Add('DESCRIPTION:Test message'); 
     MailMessage.Body.Add('PRIORITY:5'); 
     MailMessage.Body.Add('END:VEVENT'); 
     MailMessage.Body.Add('END:VCALENDAR'); 
     MailMessage.ContentType := 'text/calendar';
     SMTP.Connect; 
     try 
       try 
         SMTP.Send(MailMessage) ; 
         Writeln('OK') 
       except on E:Exception do 
         Writeln(0,'ERROR: ' + E.Message) ; 
       end; 
     finally 
       SMTP.disconnect; 
     end; 
   finally 
    SMTP.Free; 
    MailMessage.Free; 
   end; 
 end; 

begin 
  try 
    SendCalendarRequest; 
    readln; 
  except 
    on E: Exception do 
      Writeln(E.ClassName,': ',E.Message); 
  end; 
end.

package mail

import (
    "bytes"
    logging "project/logging"
    "fmt"
    "log"
    "mime/multipart"
    "net/textproto"

    "gopkg.in/mail.v2"
)

func SendWithAttachment(from string, to []string, subject, bodyHTML string, attachmentName string, attachmentData []byte) error {
    logoURL := "/path/to/cs.jpg"
    m := mail.NewMessage()
    m.SetHeader("From", from)
    m.SetHeader("To", to...)
    m.SetHeader("Subject", subject)
    m.Embed(logoURL)

    // Create a multipart message
    body := &bytes.Buffer{}
    writer := multipart.NewWriter(body)

    // Add HTML part
    htmlPart := make(textproto.MIMEHeader)
    htmlPart.Set("Content-Type", "text/html")
    htmlPart.Set("Content-Transfer-Encoding", "quoted-printable")
    htmlPartWriter, err := writer.CreatePart(htmlPart)
    if err != nil {
        logging.NewDefaultLogger().Errorf("Error creating html part: %s", err)
        return err
    }
    htmlPartWriter.Write([]byte(bodyHTML))

    // Add Attachment part
    attachmentPart := make(textproto.MIMEHeader)
    attachmentPart.Set("Content-Type", "application/octet-stream")
    attachmentPart.Set("Content-Transfer-Encoding", "base64")
    attachmentPart.Set("Content-Disposition", `attachment; filename="`+attachmentName+`"`)
    attachmentPartWriter, err := writer.CreatePart(attachmentPart)
    if err != nil {
        logging.NewDefaultLogger().Errorf("Error creating attachment part: %s", err)
        return err
    }
    attachmentPartWriter.Write(attachmentData)

    writer.Close()

    m.SetBody("multipart/mixed", body.String())

    fmt.Printf("Sending mail.....")
    err = gs.dialer.DialAndSend(m)
    if err != nil {
        logging.NewDefaultLogger().Errorf("Error sending email..: %s", err)
        return err
    }
    return nil
}

m := mail.NewMessage()
    m.SetHeader("From", emailDetails.From)
    m.SetHeader("To", emailDetails.To...)
    m.SetHeader("Subject", emailDetails.Subject)

    if emailDetails.BodyHTML != "" {
        m.SetBody("text/html", emailDetails.BodyHTML)
    } else {
        m.SetBody("text/plain", emailDetails.BodyPlain)
    }

    if emailDetails.AttachmentName != "" && len(emailDetails.AttachmentData) > 0 {
        m.Attach(emailDetails.AttachmentName, mail.SetCopyFunc(func(writer io.Writer) error {
            _, err := writer.Write(emailDetails.AttachmentData)
            return err
        }))
    }