telnet interia.pl 587
Trying 217.74.65.23...
Connected to interia.pl.
Escape character is '^]'.
220 ESMTP INTERIA.PL
HELO itsme
250 poczta.interia.pl
AUTH LOGIN
334 VXNlcm5hbWU6
myusernameinbase64
334 UGFzc3dvcmQ6
mypasswordinbase64
235 2.7.0 Authentication successful
MAIL FROM: <myusername@interia.pl>
250 2.1.0 Ok
RCPT TO: <test1@gmail.com>
250 2.1.5 Ok
RCPT TO: <test2@interia.pl>
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
From: fakeemail@wp.pl
Subject: msg subject

msg body

.
250 OK. ID: cbf07b124a2fe43b
QUIT
221 2.0.0 Bye
Connection closed by foreign host.

telnet interia.pl 587
Trying 217.74.65.23...
Connected to interia.pl.
Escape character is '^]'.
220 ESMTP INTERIA.PL
HELO itsme
AUTH LOGIN
334 VXNlcm5hbWU6
myusernameinbase64
334 UGFzc3dvcmQ6
mypasswordinbase64
235 2.7.0 Authentication successful
MAIL FROM: <myusername@interia.pl>
250 2.1.0 Ok
RCPT TO: <test1@gmail.com>
250 2.1.5 Ok
RCPT TO: <test2@interia.pl>
250 2.1.5 Ok
DATA
To: everyone@example.com
From: TillLindemann@Rammstein.de
MIME-Version: 1.0
Subject: IMG sending test
Content-Type: multipart/mixed; boundary=sep
--sep
msg body
--sep
Content--Type: text/x-log; name="image.png"
Content-Disposition: attachment; filename="image.png"
Content-Transfer-Encoding: base64


jEZxHEdKRTIKpRyG4SAIAxXL1UI57xcH3R/F+JMQmxPny2Qs8tuXypnUL8kbFo/3
LAAAAAAAAMA/jBCilNrZ2bmXrY9hYZk83LlUny3LymQy41yLfwJjjDE28+GFQmGO
F/P/uOuGxNTxaSa5dUzKivMEQsjy8nKj0djY2CgWi+fn57ce4nDOa2sr8subbviC
FDZyYnXVf8xczlzBXI9Rj7keczlzp6fVaJ1orROdxCMlVSijYaf19efpR/r9bbVW
5pxPWdvkUu+0xqkWdB8JAAAAAAAAAFIihMyrDggAAH8PpTSbze7v76+vr5dKpWaz
efP/MBzXdSuVimVZR0fvh9/eJUkSah3OenqTFeJ5XqVWqVQqppMmAAAAAAAAAAAA
ANwP5tv5vb29Wq22trbWbDallNcNdizL4pxXq9VSqRQEQfr2hdcxgeuml6KFHCIA
AAAAAAAAAACA+4VSalnW4eFhq9Wq1+vD4XDc8nHCL6MJuimJikbWAAAAAElFTkSu
QmCC
...
--sep--
.
QUIT