Research and Learning on linuxmail and sendmail

As a tool for system interaction with users, mail plays an important role. the system or program can put some key events or messages in mail for users to view. As a linux script developer and system maintenance personnel, learn about mail commands and send emails using sendmail.

As a tool for system interaction with users, mail plays an important role. the system or program can put some key events or messages in mail for users to view. As a linux script developer and system maintenance personnel, it is essential to understand the mail command and use sendmail to send emails.

1. View emails via mail

Enter mail in the command line

[Boco @ redhat5 ~] $ MailMail version 8.1 6/6/93. Type? For help. "/var/spool/mail/boco ": 2 messages 2 new> N 1 root@redhat5.4-baby Fri Feb 14 18/600 "hello boco" N 2 root@redhat5.4-baby Fri Feb 14 17/567 &? Mail Commandst
 
  
Type messages: displays the specified email n goto and type next messagee.
  
   
Edit messagesf
   
    
Give head lines of messagesd
    
     
Delete messages delete a specified email,
     You can use d 2-100 to delete 2nd to 100 emails.S
     
      
File append messages to file write to file u
      
        Undelete messagesR
       
         Reply to message sendersr
        
          Reply to message senders and all recipientspre
         
           Make messages go back to/usr/spool/mail m
          
            Mail to specific usersq quit, saving unresolved messages in mbox
           Save the emails you have viewed ~ /Mbox. If pre is executed, it is not saved.X quit, do not remove system mailbox
           The effect does not seem to have been seen.H print out active message headers
           Show email list! Shell escape executes the command cd [directory] chdir to directory or home if none givenA
           
             Consists of integers, ranges of same, or user names separatedby spaces. If omitted, Mail uses the last message typed.
            
              Consists of user names or aliases separated by spaces. Aliases are defined in. mailrc in your home directory .&
            
           
          
         
        
       
      
     
    
   
  
 

If the email is received and placed in ~ /Mbox can view them as follows:

    # mail -f ~/mbox

2. send internal emails

Mail-s "hi, boco, I'm root" boco <email content
Or
Mail-s "hi, boco, I'm root" snail il
Plz reply me, snail il.
.
Cc:

Note]Use. or Ctrl + D or. to end the content input
Note]By default, the work is interrupted by pressing Ctrl + C twice.

3. send external emails

Mail-s "fff"God_is_coming@163.com
This is sent using the current username @ host name as the username.

Because the mail has to rely on sendmail to deliver the mail, according to the online information, you can check if sendmail has any emails to be sent. if not, it indicates that all emails have been sent. (Of course, yourThe sendmail service must be on)

 [root@pps ~]# sendmail -bp /var/spool/mqueue is empty                    Total requests: 0

Online usageSendmail can send external emails with a specific user name.But I did not try it on redhat 5.4. However, the following method can be used.
Download new sendEmail
SendEmail homepage http://caspian.dotconf.net/menu/Software/SendEmail/
Http://caspian.dotconf.net/menu/Software/SendEmail/sendEmail-v1.56.tar.gz
Decompress and run
# Tar-zxvf sendEmail-v1.56.tar.gz
# Cd sendEmail-v1.56
Then confirm that it has the execution permission.

[Root @ redhat5 sendEmail-v1.56] #. /sendEmail-f god_is_coming@163.com-t weichaofan@boco.com.cn-u "from sendmail"-xu god_is_coming@163.com-xp ××× (password) -m happy3-s smtp.163.com Feb 14 13:15:19 redhat5 sendEmail [684]: Email was sent successfully! [Root @ redhat5 sendEmail-v1.56] #Explanation:-f indicates the sender's email address.-T indicates the recipient's email address.-S indicates the domain name or ip address of the SMTP server.-u indicates the subject of the email.-xu indicates the user name for SMTP verification.-xp indicates the password for SMTP Authentication. (no special characters are allowed) -m indicates the Mail content

If you do not include the-m parameter, you will be prompted to enter
Reading message body from STDIN because the '-M' option was not used.
If you are manually typing in a message:
-First line must be received within 60 seconds.
-End manual input with a CTRL-D on its own line

End with CTRL-D after input is complete

Of course we can.Send the content of a file as the body of the emailOf
Then you can use:

Cat file name |/usr/local/bin/sendEmail-f sender@163.com-t receiver@163.com-s smtp.163.com-u "subject"-xu sender-xp 123456-m happy