cat > sendmymail.sh
#!/bin/bash
/usr/sbin/sendmail -t <<EOF
From: Mail testing <abc@gmail.com>
To: abc@gmail.com
Cc: abc@gmail.com
Bcc: abc@gmail.com
Subject: mail testing
----------------------------------
This is the mail content ...
---------------------------------
EOF
chmod u+x sendmymail.sh
./sendmymail.sh
man sendmail
-t参数的含义
-t Read message for recipients. To:, Cc:, and Bcc: lines will be
scanned for recipient addresses. The Bcc: line will be deleted
before transmission.