SMTP SMTP AUTH CRAM-MD5 SASL RFC2195 RFC4954 # # Server-side AUTH CRAM-MD5 REPLY AUTH 334 PDE5NzIuOTg3NjU0MzIxQGN1cmw+ REPLY dXNlciA3MDMxNzI1NTk5ZmRiYjVkNDEyNjg5YWEzMjNlM2UwYg== 235 Authenticated # # Client-side smtp crypto SMTP CRAM-MD5 authentication mail body smtp://%HOSTIP:%SMTPPORT/905 --mail-rcpt recipient@example.com --mail-from sender@example.com -u user:secret -T - # # Verify data after the test has been "shot" EHLO 905 AUTH CRAM-MD5 dXNlciA3MDMxNzI1NTk5ZmRiYjVkNDEyNjg5YWEzMjNlM2UwYg== MAIL FROM: RCPT TO: DATA QUIT mail body .