introduction to e-mail system and postfix

Mail Server

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self = {

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傑洛Zero

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eecesnmgMail Server

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} # self

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What is Mail Server?

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郵8

件9

伺10

服11

器12

The Most IMPORTANT Server

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Why?

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Because they use it everyday!

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Concepts

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Traditional Mail Delivery

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Electronic equivalent

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MUAMTAMDA

Mail User AgentMail Transfer AgentMail Delivery Agent

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Mail User Agent

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Mail Transfer Agent

a.k.a 郵件伺服器

e.g. Sendmail, Postfix

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Mail Delivery Agent

幫忙把郵件放到個人的信箱去

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e-Mail delivery

Sender(MUA)

Servers (MTA, MDA)

Receiver(MUA)

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Let’s play.

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228-205:~ Zero$ telnet localhost 25

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228-205:~ Zero$ telnet localhost 25Connected to localhost.Escape character is '^]'.220 228-205.dorm.ncu.edu.tw ESMTP Postfix

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228-205:~ Zero$ telnet localhost 25Connected to localhost.Escape character is '^]'.220 228-205.dorm.ncu.edu.tw ESMTP Postfixhelo ce.ncu.edu.tw250 228-205.dorm.ncu.edu.tw

跟主機打招呼

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228-205:~ Zero$ telnet localhost 25Connected to localhost.Escape character is '^]'.220 228-205.dorm.ncu.edu.tw ESMTP Postfixhelo ce.ncu.edu.tw250 228-205.dorm.ncu.edu.twmail from:Zero<zero@ce.ncu.edu.tw>250 2.1.0 Okrcpt to:Target<target@my.target.edu.tw>250 2.1.5 Ok

說明寄信者跟收信人

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228-205:~ Zero$ telnet localhost 25Connected to localhost.Escape character is '^]'.220 228-205.dorm.ncu.edu.tw ESMTP Postfixhelo ce.ncu.edu.tw250 228-205.dorm.ncu.edu.twmail from:Zero<zero@ce.ncu.edu.tw>250 2.1.0 Okrcpt to:Target<target@my.target.edu.tw>250 2.1.5 Okdata354 End data with <CR><LF>.<CR><LF>This is a test mail..250 2.0.0 Ok: queued as 2F516B326C

再來就是要寫信啦！

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quit221 2.0.0 ByeConnection closed by foreign host.

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概念搞定了

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那來教你怎麼裝（本範例僅供參考?）

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Why ?

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FreeBSD/i386 (MailSec.ce.ncu.edu.tw) (ttyv0)

login: Zero

password:

Welcome to FreeBSD!

[Zero@MailSec] /home/Zero$

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[Zero@MailSec] /home/Zero$ sudo su[root@MailSec] /home/Zero$ cd /usr/ports/mail/postfix[root@MailSec] /usr/ports/mail/postfix $ make install..........

最後加入這些東西到/etc/rc.conf

sendmail_enable="NO"sendmail_submit_enable="NO"sendmail_outbound_enable="NO"sendmail_msp_queue_enable="NO"postfix_enable="YES"

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Service Control

• Startsudo postfix start

• Stopsudo postfix stop

• Restartsudo postfix restart

• Logtail -F /var/log/maillog

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Then? Cross your finger.

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After Postfix installed

• SASL Authentication

• Some configuration

• Anti-Spam

• Anti-Virus

• Webmail

• ....

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