我想使用MailKit通过我们的Exchange服务器发送电子邮件,使用该进程的凭据.
使用域/用户名/密码构建NetworkCredential：
- using (var client = new SmtpClient(ProtocolLogger))
- {
- client.Connect(server,port);
- // Works
- var creds = new NetworkCredential(username,password,domain);
- client.Authenticate(creds);
- client.Send(msg);
- }
如果我在以同一用户身份运行时使用CredentialCache.DefaultNetworkCredentials,则会因MailKit.Security.AuthenticationException而失败：
- using (var client = new SmtpClient(ProtocolLogger))
- {
- client.Connect(server,port);
- // Authentication failure
- client.Authenticate(CredentialCache.DefaultNetworkCredentials);
- client.Send(msg);
- }
ProtocolLogger输出如下(邮件服务器和base64编码的字符串已更改)：
- Connected to smtp://mymailserver:25/?starttls=when-available
- S: 220 mymailserver Microsoft ESMTP MAIL Service ready at Thu,30 Jun 2016 12:45:04 +0930
- C: EHLO [172.1.1.2]
- S: 250-mymailserver Hello [172.1.1.2]
- S: 250-SIZE 51200000
- S: 250-PIPELINING
- S: 250-DSN
- S: 250-ENHANCEDSTATUSCODES
- S: 250-STARTTLS
- S: 250-X-ANONYMOUSTLS
- S: 250-AUTH NTLM LOGIN
- S: 250-X-EXPS GSSAPI NTLM
- S: 250-8BITMIME
- S: 250-BINARYMIME
- S: 250-CHUNKING
- S: 250-XEXCH50
- S: 250 XRDST
- C: STARTTLS
- S: 220 2.0.0 SMTP server ready
- C: EHLO [172.1.1.2]
- S: 250-mymailserver Hello [172.1.1.2]
- S: 250-SIZE 51200000
- S: 250-PIPELINING
- S: 250-DSN
- S: 250-ENHANCEDSTATUSCODES
- S: 250-AUTH NTLM LOGIN
- S: 250-X-EXPS GSSAPI NTLM
- S: 250-8BITMIME
- S: 250-BINARYMIME
- S: 250-CHUNKING
- S: 250-XEXCH50
- S: 250 XRDST
- C: AUTH NTLM {EncodedStringRemoved}
- S: 334 {EncodedStringRemoved}
- C: {EncodedStringRemoved}
- S: 535 5.7.3 Authentication unsuccessful
- C: AUTH LOGIN
- S: 334 {EncodedStringRemoved}
- C:
- S: 334 {EncodedStringRemoved}
- C:
- S: 334 {EncodedStringRemoved}
- C: QUIT
- S: 334 {EncodedStringRemoved}
值得注意的是,System.Net.Mail.SmtpClient在将UseDefaultCredentials属性设置为true时使用DefaultNetworkCredentials,这对我有用.我想使用MailKit,因为ProtocolLogging等额外的功能.
