root@localhost$ openssl s_client -crlf -quiet -starttls smtp -connect mail.server.com:465 depth=0 OU = GT85507400, OU = See www.rapidssl.com/resources/cps (c)14, OU = Domain Control Validated - RapidSSL(R), CN = *.name.com verify ... 250 HELP > EHLO client.com 250-mail.server.com Hello client.com [192.168.1.2] 250-SIZE 52428800 250-8BITMIME 250-PIPELINING 250-AUTH PLAIN LOGIN 250 HELP > AUTH LOGIN 334 VXNlcm5hbWU6 > [base64 code of username] 334 UGFzc3dvcmQ6 > [base64 code of password] 235 Authentication succeeded > MAIL FROM:support@server.com 250 OK > RCPT TO:yang@client.com 250 Accepted > DATA 354 Enter message, ending with "." on a line by itself > Subject:mail sending with mail.server.com > This is a test mail from mail.server.com, sent by openssl. > . 250 OK id=1YGmlz-0049vF-0V > quit 221 mail.server.com closing connection |
以 > 开始的行是客户端需要输入的命令。