!"#$%&'%()*+,% %/'01%2$30%)4)% )5%01670%)8% 9:01%;6*0%&4%/"#$%&'%()*+, • <.+%&=%0$>0%#?#%@$A01%B?C% • DE%@$F%#$G*%#?#%/H%,+I6%J*%2$KL01%MI0% • NKO#% %/'01%PQ01%P5+%@PR0%@$S%1+T+% • U$A01%#E%V?#%@$W#% • DE%@$F%JKO#%X#$%$O2%&T+%#L%#$S%)5%$E*Y%$Z% @301%[$E*%#A01%[$*+Y%\] 9$=0$%2$30%#^*%$I%@$_01%()*+,% • `)*+,a%@$A01%B?C%JKO#%@P*C%J:+%1+H*%#?#%@$=0$% 2$30]% • b*+,%c-(P%d1(0@a%1+*C%/+I0%#$C%2$e2%fg!%#E% @$F%@P6h%#>2%&=C%$I%@$_01%()*+,%JF%1.+%)*+,%&=% 0$>0%)*+,% • b*+,%9P*0-i(P%d1(0@a%2$30%)4)%#$C%2$e2% #$6hF0%MS2%#?#%()*+,% • b*+,%!(,+&(Ph%d1(0@a%2$30%)4)%#$6hF0%()*+,% JS0%#$C%fg!% DL%#$S%#^*%$I%@$_01%()*+,% !"# !$# !"# !$# %&'()&(' *!"+ , /01/23&4 56789/:;/2<&6 =>?/'47/5*$ @>/ABC/'47/6;9/A9 *!"+ +D+E%!#+ F(0/*()G() F(0/!39H $5* , /0I&/649/!J , /0I&/649/!J , /01/23&4 56789/:;/2<&6 =>?/'47/5*$ @>/ABC/'47/6;9/A9 *!"+ +D+E%!#+ F(0/*()G() F(0/!39H trunghq@hut.edu.vn N"0$%/Z01%@$A01%B?C% gb9j trunghq@ubuntu:~$ telnet 127.0.0.1 25 Trying 127.0.0.1 Connected to 127.0.0.1. Escape character is '^]'. 220 ubuntu.localdomain ESMTP Postfix (Ubuntu) helo trunghq.com 250 ubuntu.localdomain MAIL FROM:trunghq@ubuntu.localdomain 250 2.1.0 Ok RCPT TO:haquoctrung@gmail.com 250 2.1.5 Ok DATA 354 End data with <CR><LF>.<CR><LF> Subject:Thu gui thu tu telnet Day la mot buc thu gui tu telnet . 250 2.0.0 Ok: queued as 913E010089F quit 221 2.0.0 Bye Connection closed by foreign host. trunghq@ubuntu:~$ tail -3 /var/log/mail.log May 18 07:34:56 ubuntu postfix/smtpd[3125]: disconnect from localhost[127.0.0.1] May 18 07:35:02 ubuntu postfix/smtp[3171]: 913E010089F: to=<haquoctrung@gmail.com>, relay=gmail-smtp l.google.com [209.85.222.80]:25, delay=143, delays=126/0.02/13/3.5, dsn=2.0.0, status=sent (250 2.0.0 OK 1274193114 12si8865853pzk.15) gb9j kCZ@%JQ01%#^*%)Q@%)*+,%-(P&(P% Dl6%$m0$%#L%Bn0%#^*%2C-o+V% • )*+,]#i% • 9$K%)'#%-2CC,%)*+,% • g)@/%/*()C0% • bhCP+1+0% • )h/ C)*+0 % • )h/(-M0*MC0% jC-o+V%b*+,BCV%kC-@%+0%@$(%!bp%%