Ubuntu sendmail system installation, configuration, send the message

In ubuntu sendmail function can easily send e-mail, sendmail ubuntu first install the two packages.

Installation of the required two packages:

Code 

1. sudo apt-get install sendmail  
2. sudo apt-get install sendmail-cf

 

Here are a few optional packages:

Code 

1. squirrelmail // provide webmail          
2. spamassassin // provide spam filtering  
3. mailman // provide support mailing list  
4. dovecot // provide POP and IMAP incoming mail server daemon  

 

 

note:

• Ubuntu under the most commonly used mail function, you need to install mailutils,
• Installation command: sudo apt-get install mailutils  
• Use functional band attachments, also need to install for sharutils,
• Installation command: sudo apt-get install sharutils; (yum install sharutils)

 

Input terminal command: ps aux | grep sendmail
output is as follows:

root     20978  0.0  0.3   8300  1940 ?        Ss   06:34   0:00 sendmail: MTA: accepting connections          
root     21711  0.0  0.1   3008   776 pts/0    S+   06:51   0:00 grep sendmail

Description sendmail has been successfully installed and started

Second, the configuration

sendmail default will send a message-oriented user machine, only to extend it to the entire Internet, will become a real mail server.

Macro open sendmail configuration file: /etc/mail/sendmail.mc

 we /etc/mail/sendmail.mc

Find the following line:

Code 

1. DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp, Addr=127.0.0.1')dnl

 Modify Addr = 0.0.0.0, indicate that can connect to any server.

Generate a new configuration file:

Code 

1. #cd / etc / mail  
2. #mv sendmail.cf sendmail.cf ~ // do a backup  
3. # M4 sendmail.mc> sendmail.cf //> around a space, an error is not installed sendmail-cf  

Third, test sending mail

Used to send mail as follows:

    1. How to write a general e-mail:  mail [email protected] Cc Cc edit objects, Subject: message subject, press enter, the body of the message, press Ctrl-D end

    2. Fast sending mode:  echo "Message Body" | mail -s message subject [email protected]

    3. contents of the file as a text message to send:  mail -s the Test [email protected] <test.txt

    4. Send e-mail with attachments:  uuencode attachment attachment name displays the name | mail -s thread Send e-mail address

       例如： uuencode test.txt test.txt | mail -s Test [email protected]

 

Attention to the problem:

　　1)

　　If you find that your sendmail start very slow, can be resolved

　　# vi /etc/hosts

　　127.0.0.1 localhost.localdomain localhost

　　changed to

　　127.0.0.1 localhost.localdomain localhost host name

　　Check the host name of the machine the command is: hostname

　　Leaving only the line on the line, you can delete the extra row

　　2)　　

*** ERROR: FEATURE() should be before MAILER()
*** MAILER(`local') must appear after FEATURE(`always_add_domain')*** ERROR: FEATURE() should be before MAILER()
*** MAILER(`local') must appear after FEATURE(`allmasquerade')*** ERROR: FEATURE() should be before MAILER()

 

The last few lines to modify sendmail.mc
vi /etc/mail/sendmail.mc
the document
MAILER_DEFINITIONS
MAILER ( `local ') DNL
MAILER (` the SMTP') DNL
into the final document (Why do so, the reason is not found, but an error the prompt that asks you to do so)