我正在开发一个应用程序，我可以在没有 IOS 邮件 API 的情况下发送邮件(邮件是使用 SES 亚马逊服务发送的，无需用户交互和附加文件...)。在我的 API 中，我必须使用所有 MIME 协议(protocol)发送编码邮件(这不是问题所在)。我发送很好的邮件，用 charset ascii 和我在 base64 中附加的 pdf 对正文进行编码:

   CFUUIDRef    uuidRef   = CFUUIDCreate(kCFAllocatorDefault);
NSString    *uuid     = (__bridge_transfer  NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuidRef);
CFRelease(uuidRef);

//Encapsulation
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableString *rawMime = [[NSMutableString alloc] init];
[rawMime appendFormat:@"To: %@\n", _to];
[rawMime appendFormat:@"From: \"%@\" <boutique@tactill.com>\n", [defaults objectForKey:@"companyName"]];
[rawMime appendFormat:@"Reply-To: %@\n", [defaults objectForKey:@"toEmailForStats"]];
[rawMime appendFormat:@"BCC: %@\n", [defaults objectForKey:@"toEmailForStats"]];
[rawMime appendFormat:@"Subject: %@\n", _subject];
[rawMime appendString:@"Date: Thu, 05 Jan 95 10:53:24 -0500\n"];
[rawMime appendFormat:@"Message-ID: <%@@%@>\n", [(NSString *)uuid stringByReplacingOccurrencesOfString:@"-" withString:@""], @"IETF.CNR I.Reston.VA.US"];
[rawMime appendString:@"Mime-Version: 1.0\n"];
[rawMime appendString:@"Content-type: Multipart/Mixed; boundary=\"NextPart\"\n"];
[rawMime appendString:@"\n"];
[rawMime appendString:@"--NextPart\n"];

//Body
[rawMime appendString:@"Content-type: text/plain; charset=\"us-ascii\"\n"];
[rawMime appendString:@"\n"];
[rawMime appendString:_body];
[rawMime appendString:@"\n"];
[rawMime appendString:@"--NextPart\n"];

//Attach pdf
[rawMime appendString:@"Content-Type: application/pdf; "];
[rawMime appendFormat:@"name=\"%@.pdf\";\n", _pdfName];
[rawMime appendFormat:@"Content-Transfer-Encoding: base64\r\n\r\n"];
[rawMime appendFormat:@"%@\n",_pdfAttached];
[rawMime appendString:@"\n"];

//If necessary attach csv
if (_csvAttached!=nil) {
    [rawMime appendString:@"--NextPart\n"];
    [rawMime appendString:@"Content-Type: text/plain; "];
    [rawMime appendFormat:@"name=\"%@.txt\";\n", _csvName];
    [rawMime appendFormat:@"Content-Transfer-Encoding: base64\r\n\r\n"];
    [rawMime appendFormat:@"%@\n",_csvAttached];
    [rawMime appendString:@"\n"];
    [rawMime appendString:@"--NextPart\n"];
}


NSData        *rawMessageData = [rawMime dataUsingEncoding:NSUTF8StringEncoding];

当我用 gmail 或邮件应用程序(OSX 或 IOS)打开邮件时，一切都很完美，但是当我用 Windows 邮件打开它时，特殊字符被更改为垃圾邮件。我读过它，我看到 Windows 邮件读取 iso-8859-1(NSISOLatin1StringEncoding)。所以我尝试在那篇文章的帮助下:[http://stackoverflow.com/questions/4553388/how-to-convert-utf8-encoding-to-iso-8859-1-encoding][1] 做那个代码:

   //add body
char converted[([_body length] + 1)];
[_body getCString:converted maxLength:([_body length] + 1) encoding: NSISOLatin1StringEncoding];   
[rawMime appendString:@"Content-type: text/plain; charset=iso-8859-1\n"];
[rawMime appendFormat:@"Content-Transfer-Encoding: quoted-printable\r\n\r\n"];
[rawMime appendFormat:@"%s", converted];
[rawMime appendString:@"\n"];
[rawMime appendString:@"--NextPart\n"];

现在所有的邮件客户端都向我显示:Merci pour votre achat。 �bient�t!当我只打印正文时，NSLog 也是如此 我做错了什么？我如何才能很好地编码邮件正文？

最佳答案

这是回答这个问题的工作代码，它添加了一个 pdf 文件，偶尔也添加了一个 csv

-(NSData*)formatedMail{


    CFUUIDRef   uuidRef   = CFUUIDCreate(kCFAllocatorDefault);
    NSString    *uuid     = (__bridge_transfer  NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuidRef);
    CFRelease(uuidRef);

    NSDate* today = [[NSDate alloc] init];
    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];

    NSString* date =[dateFormatter stringFromDate:today];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSMutableString *rawMime = [[NSMutableString alloc] init];
    [rawMime appendFormat:@"To: %@\n", email_to];
    [rawMime appendFormat:@"From: \"name_from" <e-mail_from>\n", [defaults objectForKey:@"companyName"]];
    [rawMime appendFormat:@"Reply-To: %@\n", [defaults objectForKey:@"toEmailForStats"]];
    [rawMime appendFormat:@"BCC: %@\n", [defaults objectForKey:@"toEmailForStats"]];
    [rawMime appendFormat:@"Subject: %@\n", _subject];
    [rawMime appendFormat:@"Date: %@\n", date];
    [rawMime appendFormat:@"Message-ID: <%@@%@>\n", [(NSString *)uuid stringByReplacingOccurrencesOfString:@"-" withString:@""], @"IETF.CNR I.Reston.VA.US"];
    [rawMime appendString:@"Mime-Version: 1.0\n"];
    [rawMime appendString:@"Content-type: Multipart/Mixed; boundary=\"NextPart\"\n"];
    [rawMime appendString:@"\n"];
    [rawMime appendString:@"--NextPart\n"];

    //Here's come the body part
    [rawMime appendString:@"Content-type: text/plain; charset=\"UTF-8\"\n"];
    [rawMime appendString:@"\n"];
    [rawMime appendString:_body];
    [rawMime appendString:@"\n"];
    [rawMime appendString:@"--NextPart\n"];

    //Attach pdf
    [rawMime appendString:@"Content-Type: application/pdf; "];
    [rawMime appendFormat:@"name=\"%@.pdf\";\n", _pdfName];
    [rawMime appendFormat:@"Content-Transfer-Encoding: base64\r\n\r\n"];
    [rawMime appendFormat:@"%@\n",_pdfAttached];
    [rawMime appendString:@"\n"];

    //If necessary attach csv
    if (_csvAttached!=nil) {
        [rawMime appendString:@"--NextPart\n"];
        [rawMime appendString:@"Content-Type: application/octet-stream; "];
        [rawMime appendFormat:@"name=\"%@\";\n", _csvName];
        [rawMime appendFormat:@"Content-Transfer-Encoding: base64\r\n\r\n"];
        [rawMime appendFormat:@"%@\n",_csvAttached];
        [rawMime appendString:@"\n"];
        [rawMime appendString:@"--NextPart\n"];
    }


    NSData        *rawMessageData = [rawMime dataUsingEncoding:NSUTF8StringEncoding];

    return rawMessageData;
}

_pdfAttached 是 NSString，表示以 base64 编码的 PDF 我希望它能有所帮助，很抱歉之前没有发布解决方案

这里的代码不是发送而是创建邮件正文。在这里你可以做一些你不能用 SESSendRawEmailRequest 做的事情，例如把一个“show name”放在 to 和 from 之间。我建议您使用这两个部分来定义发件人，您会发现它提供了只有 SESSendRawMessage 无法提供的可能性。最后说，如果您不想出现异常，您不应该忘记在 SESSEndRawEmailRequest 中输入发件人和发件人地址。

关于IOS 编码正文邮件(为 SES 创建我自己的 mime 邮件)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10228039/