| You do/type this | Server responds with |
| Telnet to hostname on port 25 | 220 (then identifies itself – possibly with several lines of 220 + text) |
| HELO your_domain_name or whatever | 250 (followed by human readable message) |
| MAIL FROM:[email protected] (ie, your email address) | 250 is syntactically correct (or similar) |
| RCPT TO:them@someplace_else.com (email address you want to send to) | 250 is syntactically correct |
| DATA | Tells you to send data then CRLF period CRLF at end |
| You type your message then CRLF period CRLF (ie, type a period on a line by itself then hit ENTER) | 250 |
| QUIT | Signoff message |
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