我正在尝试解决 SMTP 问题。我的凭据通过 OS X 邮件客户端（以及其他区域）工作得很好，所以凭据绝对是好的。但是，当我尝试通过以下方式提交它们时：openssl s_client -starttls smtp -crlf -connect smtp.mail.me.com:587，我收到 535 响应（身份验证失败）。
我使用 Wireshark 观察了这两个交换，它们看起来很相似，尽管我还没有弄清楚如何解密流量以便能够以明文形式查看邮件客户端的交换。
[编辑：我尝试使用 openssl 访问我的 gmail 帐户，使用 AUTH PLAIN 运行正常。Apple 的 AUTH 系统有什么奇怪吗？]
这是 openssl 交换，在需要时匿名：
openssl s_client -starttls smtp -crlf -connect smtp.mail.me.com:587
CONNECTED(00000003)
depth=2 /C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006 VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3 Public Primary Certification Authority - G5
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
0 s:/C=US/ST=California/L=Cupertino/O=Apple Inc./CN=*.mail.me.com
i:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=Terms of use at https://www.verisign.com/rpa (c)10/CN=VeriSign Class 3 Secure Server CA - G3
1 s:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=Terms of use at https://www.verisign.com/rpa (c)10/CN=VeriSign Class 3 Secure Server CA - G3
i:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006 VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3 Public Primary Certification Authority - G5
2 s:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006 VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3 Public Primary Certification Authority - G5
i:/C=US/O=VeriSign, Inc./OU=Class 3 Public Primary Certification Authority
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIFC......certificate characters....50bq4=
-----END CERTIFICATE-----
subject=/C=US/ST=California/L=Cupertino/O=Apple Inc./CN=*.mail.me.com
issuer=/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=Terms of use at https://www.verisign.com/rpa (c)10/CN=VeriSign Class 3 Secure Server CA - G3
---
No client certificate CA names sent
---
SSL handshake has read 4717 bytes and written 491 bytes
---
New, TLSv1/SSLv3, Cipher is AES128-SHA
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1
Cipher : AES128-SHA
Session-ID: 15987251B4A0B361AC3690B88A2A972C57747B5CAD15B613D92F6CE97284789F
Session-ID-ctx:
Master-Key: [long string here]
Key-Arg : None
Start Time: 1417991368
Timeout : 300 (sec)
Verify return code: 0 (ok)
---
250 SIZE 28311552
ehlo testing
250-st11p00mm-asmtp002.mac.com
250-8BITMIME
250-PIPELINING
250-CHUNKING
250-DSN
250-ENHANCEDSTATUSCODES
250-EXPN
250-HELP
250-XADR
250-XSTA
250-XCIR
250-XGEN
250-XLOOP 2CE0B8913D00E705D3D542BA5DF0FCE8
250-AUTH PLAIN LOGIN ATOKEN
250-AUTH=LOGIN PLAIN
250-NO-SOLICITING
250 SIZE 28311552
AUTH PLAIN
334
[base-64 credentials entered here]
535 5.7.8 Bad username or password (Authentication failed).