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Telnet Mail

2013-07-26 @ HowTos

Telnet whooop whooop

## telnet mx.example.com 25
Trying 217.145.99.52...
Connected to mx.example.com.
Escape character is '^]'.
220 mx02.example.com ESMTP Postfix (Debian/GNU)
helo example.com
250 mx02.example.com
mail from: support@example.com
250 2.1.0 Ok
rcpt to info@example.com
501 5.5.4 Syntax: RCPT TO:<address>
rcpt to:info@example.com
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
subject:test-nachricht
Dies ist eine Test-Nachricht. Bitte ignorieren.
.
250 2.0.0 Ok: queued as 5914D1CAEB

500 5.5.2 Error: bad syntax

AUTH LOGIN

Vorbereitet sein mit BASE64 Username und Passwort

perl -MMIME::Base64 -e 'print encode_base64("passwort");'
perl -MMIME::Base64 -e 'print encode_base64("username");'

Verschl├╝sselte Verbindung aufbauen

openssl s_client -connect 1.2.3.4:465
---
220 s3.neomailbox.net ESMTP
ehlo noc.example.com
250-mx.example.com Hello noc.example.com [127.0.0.1]
250-SIZE 52428800
250-PIPELINING
250-AUTH CRAM-MD5 PLAIN LOGIN
250-STARTTLS
250 HELP
AUTH LOGIN
334 LOLO
TROLO
334 NOPE
LOLOTO
235 Authentication succeeded
MAIL FROM:wa1@noqqe.de
250 OK
RCPT TO:wa1@noqqe.de
RENEGOTIATING
depth=1 C = BE, O = GlobalSign nv-sa, CN = AlphaSSL CA - SHA256 - G2
verify error:num=20:unable to get local issuer certificate
verify return:0