macros@/home/macros> telnet server 25
Trying x.x.x.x...
Connected to server.
Escape character is '^]'.
220 server MERCUR SMTP Server (v4.02.28 Mjk4NDctNjI3Ny0xODk1Nw==) for Windows NT ready
ehlo macros
250-server
250-PIPELINING
250-SIZE 10240000
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-AUTH=LOGIN CRAM-MD5 PLAIN
250 AUTH LOGIN CRAM-MD5 PLAIN
mail from: macros@server
250 2.1.0 Ok
rcpt to: macros@macros.md
530 5.7.1 sorry, relaying is denied
quit
221 2.0.0 Bye
Connection closed by foreign host.