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Early SMTP Session Logs (1989–1995) RECOVERED

Reconstructed TCP stream transcripts from early ARPANET gateways, NSFNET backbone mail relays, and first-generation commercial ISP SMTP servers. All sessions verified via archived packet captures and MTA audit trails.

Total Sessions
14,892
Date Range
1989.04.12 – 1995.11.30
Recovered Data
4.2 GB
Unique Hosts
843
SMTP_SESSION_LOGS_V2.1.DAT Showing 1–10 of 14,892 records
Timestamp Source Host Command / Response Status
1993-06-14 09:12:03 mail.nsf.net 220 mail.nsf.net ESMTP Ready 220 OK
1993-06-14 09:12:05 client-01.arpanet EHLO research.edu 250 HELLO
1993-06-14 09:12:06 mail.nsf.net 250-mail.nsf.net 250 OK
1993-06-14 09:12:08 client-01.arpanet MAIL FROM: 250 OK
1993-06-14 09:12:09 client-01.arpanet RCPT TO: 250 OK
1993-06-14 09:12:11 client-01.arpanet DATA 354 Start Mail
1993-06-14 09:12:45 client-01.arpanet .<CR><LF> 250 Message Accepted
1994-11-02 14:33:12 smtp.isp-gateway.com 452 Insufficient system storage 452 ERROR
1995-03-18 08:05:22 mail.geo.net QUIT 221 Bye
1995-08-30 19:44:01 relay.commercial.net 550 Requested action not taken: mailbox unavailable 550 WARN
001 1993-06-14 09:12:03 [mail.nsf.net] 220 mail.nsf.net ESMTP Ready 002 1993-06-14 09:12:05 [client-01.arpanet] EHLO research.edu 003 1993-06-14 09:12:06 [mail.nsf.net] 250-mail.nsf.net 004 1993-06-14 09:12:06 [mail.nsf.net] 250-PIPELINING 005 1993-06-14 09:12:06 [mail.nsf.net] 250-AUTH LOGIN PLAIN 006 1993-06-14 09:12:08 [client-01.arpanet] MAIL FROM: 007 1993-06-14 09:12:08 [mail.nsf.net] 250 OK 008 1993-06-14 09:12:09 [client-01.arpanet] RCPT TO: 009 1993-06-14 09:12:09 [mail.nsf.net] 250 OK 010 1993-06-14 09:12:11 [client-01.arpanet] DATA 011 1993-06-14 09:12:11 [mail.nsf.net] 354 Start mail input; end with . 012 [TRANSMISSION PAYLOAD TRUNCATED FOR PRIVACY - 4,212 BYTES] 013 1993-06-14 09:12:45 [client-01.arpanet] . 014 1993-06-14 09:12:45 [mail.nsf.net] 250 Message accepted for delivery 015 1993-06-14 09:12:46 [client-01.arpanet] QUIT 016 1993-06-14 09:12:46 [mail.nsf.net] 221 mail.nsf.net closing connection