>I'm currently trying to write a tool to test, if SMTP AUTH
>works or not. (Every few weeks, the SMTPD stops authenticating
>users. This seems to be a known problem and does still exist
>in v6.05a)
>
>My questions is: How is the dialog with the SMTP server when
>SMTP AUTH is used? I've read the RFCs but didn't understand
>how the challenge between client and server is done.
Here's a byte-level loggin by Eudora:
210 64:16.49 Rcvd: "220 X1 NT-ESMTP Server ms1.meiway.com (IMail
6.04 1253-1)\r\n"
210 32:16.49 Sent: "EHLO sv.Go2France.com\r\n"
210 64:16.49 Rcvd: "250-ms1.meiway.com says hello\r\n"
210 64:16.49 Rcvd: "250-SIZE 0\r\n"
210 64:16.49 Rcvd: "250-8BITMIME\r\n"
210 64:16.49 Rcvd: "250-DSN\r\n"
210 64:16.49 Rcvd: "250-ETRN\r\n"
210 64:16.49 Rcvd: "250-AUTH LOGIN CRAM-MD5\r\n"
210 64:16.49 Rcvd: "250-AUTH=LOGIN\r\n"
210 64:16.49 Rcvd: "250 EXPN\r\n"
210 32:16.49 Sent: "AUTH CRAM-MD5\r\n"
210 64:16.49 Rcvd: "334 PDE0NOTA4QG1zMT4=\r\n"
210 32:16.49 Sent: "bGNvbnJhZCVHbzJGcmFWVhNmJhNDA2NzFmYTg0NDcxMjUz\r\n"
210 64:16.49 Rcvd: "235 authenticated\r\n"
210 32:16.49 Sent: "RSET\r\n"
210 64:16.49 Rcvd: "250 ok its reset\r\n"
210 32:16.49 Sent: "MAIL FROM:<[EMAIL PROTECTED]>\r\n"
210 64:16.49 Rcvd: "250 ok\r\n"
210 32:16.49 Sent: "RCPT TO:<[EMAIL PROTECTED]>\r\n"
210 64:16.49 Rcvd: "250 ok its for <[EMAIL PROTECTED]>\r\n"
210 32:16.49 Sent: "DATA\r\n"
210 64:16.49 Rcvd: "354 ok, send it; end with <CRLF>.<CRLF>\r\n"
1. When the SMTPD process that doesn SMTP AUTH is not responding,
then after the mail client sends this line:
210 32:16.49 Sent: "AUTH CRAM-MD5\r\n"
there is no response.
2. the other failure is the SMTPD AUTH is working, but refusing logins.
Len
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