You help me analyze this handbook is the reason Redhat 7.3 handbook issued under phenomenon : all mail sent to users of the machine 本机IP is 10.10.10.176 (redhat 7.3) There is a mail server LAN 10.10.10.8 (Windows, domain truetel.com.cn) In the distribution of Linux machines handbook Xuedz@truetel.com.cn then mail when mail has not submitted to the xuedz truetel.com.cn users This is transmitted to the machine xuedz Linux users. Will the issue of the allocation of how sendmail? #cat /etc/hosts Host176 localhost.localdomain 127.0.0.1 localhost 10.10.10.176 h176 10.10.10.8 truetel.com.cn #grep "Cw" /etc/sendmail.cf Cwlocalhost localhost.localdomain truetel.com.cn #cat /etc/mail/access Localhost.localdomain RELAY Localhost RELAY 127.0.0.1 RELAY 10.10.10 RELAY /etc/mail/domaintable Air; /etc/mail/mailertable Air; /etc/mail/virtusertable Air; Send mail when the LOG : #tail /var/log/maillog Jan 20 11:00:24 host176 sendmail[26518] : j0K30Ov26518 : from=root, size=42, class=0, nrcpts=1. msgid=<200501200300.j0K30Ov26518@localhost.localdomain>;, relay=root@localhost Jan 20 11:00:24 host176 sendmail[26522] : j0K30Ov26518 : to=xuedz@truetel.com.cn, ctladdr=root (0/0) delay=00:00:00. xdelay=00:00:00, mailer=local, pri=30042, dsn=2.0.0, stat=Sent [ Closed window ]