It's such a polite protocol.
In witness thereof I give you the following exchange between me and my mail server. I was doing a 'manual' connection (pointing telnet at port 25 -- the SMTP port number) to verify connectivity through the firewall. My commands are in bold, the mail server's responses are in italics.
In witness thereof I give you the following exchange between me and my mail server. I was doing a 'manual' connection (pointing telnet at port 25 -- the SMTP port number) to verify connectivity through the firewall. My commands are in bold, the mail server's responses are in italics.
beta:~$ telnet wixer.syrinx.org 25...If only some people could be that pleasent. :-)
Trying 199.105.240.21...
Connected to wixer.syrinx.org.
Escape character is '^]'.
220 wixer.syrinx.org ESMTP Sendmail 8.12.11/8.12.11; Thu, 11 May 2006 09:13:54 -0400
HELO beta.houseofhum.com
250 wixer.syrinx.org Hello beta [65.75.17.32], pleased to meet you
QUIT
221 2.0.0 wixer.syrinx.org closing connection
Connection closed by foreign host.
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- House of Hum
Comments
250 my.hostname.invalid - you are a charlatan
I'm glad I finished drinking my tea before I pulled up LJ ... 'cause it would have come out of my nose just now!