SMTP SMTP AUTH NTLM SMTP AUTH PLAIN SASL DOWNGRADE RFC4954 # # Server-side AUTH NTLM PLAIN REPLY "AUTH NTLM" 334 NTLM supported REPLY TlRMTVNTUAABAAAABoIIAAAAAAAAAAAAAAAAAAAAAAA= 334 Rubbish REPLY * 501 AUTH exchange cancelled by client REPLY "AUTH PLAIN" 334 PLAIN supported REPLY dXNlcgB1c2VyAHNlY3JldA== 235 Authenticated # # Client-side smtp NTLM !SSPI SMTP NTLM authentication with SASL downgrade mail body # we force our own host name, in order to make the test machine independent CURL_GETHOSTNAME=curlhost # we try to use the LD_PRELOAD hack, if not a debug build LD_PRELOAD=%PWD/libtest/.libs/libhostname.so smtp://%HOSTIP:%SMTPPORT/936 --mail-rcpt recipient@example.com --mail-from sender@example.com -u user:secret -T - chkhostname curlhost # # Verify data after the test has been "shot" EHLO 936 AUTH NTLM TlRMTVNTUAABAAAABoIIAAAAAAAAAAAAAAAAAAAAAAA= * AUTH PLAIN dXNlcgB1c2VyAHNlY3JldA== MAIL FROM: RCPT TO: DATA QUIT mail body .