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Introducing E-mail system concepts and postfix installation to NCU eecesnmg's new member.
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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<[email protected]>250 2.1.0 Okrcpt to:Target<[email protected]>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<[email protected]>250 2.1.0 Okrcpt to:Target<[email protected]>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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