SMTP SMTP AUTH CRAM-MD5 RFC2195 RFC4954 # # Server-side REPLY EHLO 250 AUTH CRAM-MD5 REPLY AUTH 334 PDE4OTYuNjk3MTcwOTUyQHBvc3RvZmZpY2UucmVzdG9uLm1jaS5uZXQ+ REPLY dGltIGI5MTNhNjAyYzdlZGE3YTQ5NWI0ZTZlNzMzNGQzODkw 235 Authenticated # # Client-side smtp crypto SMTP CRAM-MD5 authentication mail body smtp://%HOSTIP:%SMTPPORT/user --mail-rcpt 905@foo --mail-from 905@from -u tim:tanstaaftanstaaf -T - # # Verify data after the test has been "shot" EHLO user AUTH CRAM-MD5 dGltIGI5MTNhNjAyYzdlZGE3YTQ5NWI0ZTZlNzMzNGQzODkw MAIL FROM:<905@from> RCPT TO:<905@foo> DATA QUIT mail body .