Mailkit SMTP错误 - BareLinefeedsAreIllegal
问题描述:
远程服务器返回'550 5.6.2 SMTPSEND.BareLinefeedsAreIllegal;消息包含裸换行符,不能经由DATA”Mailkit SMTP错误 - BareLinefeedsAreIllegal
var message = new MimeMessage();
message.From.Add(new MailboxAddress(nameFrom, mailboxFrom));
message.Subject = Subject;
message.To.Add(new MailboxAddress(mailboxTo));
var bodyBuilder = new BodyBuilder();
var multipart = new Multipart("mixed");
bodyBuilder.HtmlBody = "Test Body";
multipart.Add(bodyBuilder.ToMessageBody());
byte[] bytes = System.IO.File.ReadAllBytes("Test.gif");
var attachment = new MimePart("binary", "bin")
{
ContentObject = new ContentObject(new MemoryStream(bytes), ContentEncoding.Base64),
ContentDisposition = new ContentDisposition(ContentDisposition.Attachment),
ContentTransferEncoding = ContentEncoding.Binary,
FileName = "F2.pdf"
};
multipart.Add(attachment);
message.Body = multipart;
using (var client = new SmtpClient())
{
// For demo-purposes, accept all SSL certificates (in case the server supports STARTTLS)
client.ServerCertificateValidationCallback = (s, c, h, e) => true;
client.Connect(ssServer, ssPort, MailKit.Security.SecureSocketOptions.Auto);
// Note: since we don't have an OAuth2 token, disable
// the XOAUTH2 authentication mechanism.
client.AuthenticationMechanisms.Remove("XOAUTH2");
// Note: only needed if the SMTP server requires authentication
client.Authenticate(ssMailBox, ssMailBoxPassword);
client.Send(message);
}
我已经用相同的结果编码ContentEncoding.Base64和ContentEncoding.Binary试图发送。当我跳过附件时,邮件正确发送。 “Test.gif”只是我上传的一个随机gif。
我已阅读关于CHUNKING or the BDAT command,但不确定这个或如何使用它与邮件包...任何建议?我只是想用附件发送一个正常的SMTP邮件,这不可能很难:|
答
的解决方案是,通过@Jstedfast所建议的改变:
ContentTransferEncoding = ContentEncoding.Base64
我误解和试图改变ContentObject enconding。
谢谢@Jstedfast
+0
是的,ContentObject的编码值是源编码,而不是传输编码:) – jstedfast
尝试将'attachment.ContentTransferEncoding'设置为'ContentEncoding.Base64'。 – jstedfast
如果这不起作用,如果您根本不添加附件,它会正确发送吗?也许纯粹的换行符在头文件中? – jstedfast
考虑到这一点,MailKit应该只设置合适的ContentTransferEncoding本身。当我做本地测试时,它确实如此。你的SMTP服务器做了什么功能宣传?如果你得到[ProtocolLog](https://github.com/jstedfast/MailKit/blob/master/FAQ.md#ProtocolLog),它真的发送了一个'DATA'命令吗?还是发送一个适当的'BDAT'?如果您的服务器支持'BINARYMIME',则MailKit应自动将编码设置为“二进制”并使用“BDAT”命令。 – jstedfast