/etc/mail/sendmail.cw¿¡ ¸ÞÀÏÀ» ¹ÞÀ» ¼ö Àִ ȣ½ºÆ® À̸§À» Àû½À´Ï´Ù. ÀÌ°÷¿¡ ÀûÀº À̸§À¸·Î ¸ÞÀÏÀÌ µé¾î¿À¸é ´õ ÀÌ»ó ´Ù¸¥°÷À¸·Î ¸ÞÀÏÀ» º¸³»Áö ¾Ê°í MDA(Mail Delivery Agent, ¸ÞÀÏÀ» MTA¿¡°Ô¼ ¹Þ¾Æ ¸ÞÀϹڽº¿¡ ÀúÀåÇÏ´Â ÇÁ·Î±×·¥)·Î Àü´ÞÇÕ´Ï´Ù. º¸Åë FQDN(Fully Qualified Domain Name)À» Àû°í ¸¸ÀÏ ¿©·¯°³ÀÇ È£½ºÆ® À̸§À» »ç¿ëÇÑ´Ù¸é ¸ðµÎ Àû¾îÁà¾ß ÇÕ´Ï´Ù.
/ $ cd /etc/mail mail $ cat sendmail.cw hostname.domain.com hostname2.domain.com
sendmail 8.9.x ¿¡¼´Â º¸¾È»ó ¸î°¡Áö µð·ºÅ丮ÀÇ ¸ðµå¸¦ °Ë»çÇؼ Àû´çÇÏÁö ¾Ê´Ù¸é sendmailÀÚü°¡ ½ÇÇàÀÌ ¾ÈµË´Ï´Ù. µû¶ó¼ ¾Æ·¡¿Í °°ÀÌ ÀÔ·ÂÇØ ÁÖ¾î¾ß ÇÕ´Ï´Ù. ÀÚ¼¼ÇÑ ³»¿ëÀº DontBlameSendmail and Enhanced File Security¸¦ Âü°íÇϽñ⠹ٶø´Ï´Ù.
/ $ chmod go-w / /etc /etc/mail /usr /var /var/spool /var/spool/mqueue / $ chown root / /etc /etc/mail /usr /var /var/spool /var/spool/mqueue
ÀÌ°Í ¿Ü¿¡µµ À¯Àúµð·ºÅ丮¿¡ ±×·ìÀÌ ¾²±â°¡´ÉÇϰųª, other°¡ ¾²±â °¡´ÉÇÏ´Ù¸é .forward°¡ ÀÛµ¿ÇÏÁö ¾Ê½À´Ï´Ù. ¸¸ÀÏ ÀÏ¹Ý »ç¿ëÀÚÀÇ .forwardÆÄÀÏÀÌ ÀÛµ¿ÇÏÁö ¾ÊÀ¸¸é ±× »ç¿ëÀÚ È¨ µð·ºÅ丮ÀÇ ¸ðµå¸¦ È®ÀÎÇϽñ⠹ٶø´Ï´Ù.
Âü°í·Î /etc/hosts ÆÄÀÏÀÇ ÇüÅ°¡ ´ëºÎºÐ ¾Æ·¡¿Í °°ÀÌ µÇ¾îÀÖ½À´Ï´Ù.
/ $ cat /etc/hosts 127.0.0.1 localhost 155.230.28.125 khaki loghost 155.230.28.115 purple
ÇÏÁö¸¸ ÀÌ ÆÄÀÏÀ» ¾Æ·¡¿Í °°ÀÌ ¼öÁ¤ÇϽñ⠹ٶø´Ï´Ù. (Â÷ÀÌÁ¡Àº ¾Æ½Ã°ÚÁÒ? ^^)
/ $ cat /etc/hosts 127.0.0.1 localhost 155.230.28.125 khaki.ce.kyungpook.ac.kr khaki loghost 155.230.28.115 purple.ce.kyungpook.ac.kr purple
ÀÌ·¸°Ô ¼³Á¤À» ¸ðµÎ ¸¶Ä¡¼Ì´Ù¸é ´ÙÀ½°ú °°ÀÌ Çؼ ¿¡·¯ ¸Þ½ÃÁö°¡ ¾ø´ÂÁö¸¦ È®ÀÎÇØ º¸½Ã±â ¹Ù¶ø´Ï´Ù.
/ $ /usr/lib/sendmail -bi
ÀÌ ¶§ ¿¡·¯ ¸Þ½ÃÁö°¡ ¾ø¾î¾ß ÇÕ´Ï´Ù. ¸¸ÀÏ ¿¡·¯ ¸Þ½ÃÁö°¡ ³µ´Ù¸é /var/log/syslog ÈÀÏÀÇ µÞºÎºÐÀ» º¸½Ã±â ¹Ù¶ø´Ï´Ù. ¸¸ÀÏ º° ¹®Á¦°¡ ¾ø´Ù¸é ÀÌÁ¦ sendmailÀ» ´Ù½Ã ¶ç¿ì½Ã¸é µË´Ï´Ù.
/ $ /usr/lib/sendmail -bd -q1h
±×¸®°í ¹Ýµå½Ã /var/log/syslog ¸¦ È®ÀÎÇϽðí, ¸ÞÀÏÀ» º¸³»°í ¹Þ´Â Å×½ºÆ®¸¦ Áö±Ý ¹Ù·Î ÇØ ÁÖ¼¼¿ä. ±×¸®°í /var/log/syslog ¿¡ ¿¡·¯ ¸Þ½ÃÁö°¡ ÀÖ´ÂÁöµµ »ìÆì º¸½Ã±â ¹Ù¶ø´Ï´Ù.