Linux email Mail

1. Installation (requires SendMail or postfix service)

Sendmail
# yum install sendmail
# systemctl start sendmail.service
# systemctl status sendmail.service
Postfix
# yum install mailx
# systemctl start postfix.service
# systemctl status postfix.service
postfix.service - Postfix Mail Transport Agent
Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
Active (running) since 2 September 19, 2017 14:08:03 CST; 1s ago
Process: 72063 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS)
Process: 72060 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)
Process: 72057 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
Main PID: 72136 (master)
CGroup: /system.slice/postfix.service
├─72136 /usr/libexec/postfix/master -w
├─72137 pickup -l -t unix -u
└─72138 qmgr -l -t unix -u
September 19 14:08:03 centos73 SYSTEMd [1]: starting postfix mail transport agent
September 19 14:08:03 centos73 postfix / Master [72136]: day started -- version 2.10.1, configuration / etc / Postfix
September 19 14:08:03 centos73 system d [1]: started postfix mail transport agent
Accessory Package: uuencode
yum install sharutils
Inspection:
netstat -tunlp |grep 25

2. Configuration

# vim /etc/mail.rc
Add the following at the end of the document
set [email protected] smtp="smtp.qq.com"
set smtp-auth-user="[email protected]" smtp-auth-password="rootroot"
set smtp-auth=login
Explain:
From: the sender displayed when the other party receives the message
SMTP: Specifies the SMTP server address of the third party sending mail
SMTP auth: authentication method of SMTP. The default is login, or cram-md5 or plan mode
SMTP auth user: user name of the third party sending mail
SMTP auth password: password corresponding to user name
Restart: (which to install and which to restart)
systemctl restart sendmail.service
systemctl restart postfix.service

3.Mail command

SMTP: simple mail transmission protocol: simple mail transmission protocol, sending mail;
POP3: Post Office Protocol
IMAP4: Internet Mail Access Protocol
Mail – s "mail subject" – C "CC address" – B "BCC address" -- F sender's email address – f sender's name < email content to be sent
Options:
-B < address >: specify the address of the addressee of the confidential copy;
-C < address >: specify the address of the addressee of the copy;
-F < mail file >: read the mail in the specified mail file;
-i: Do not display the information sent by the terminal;
-1: Use interactive mode;
-n: When using the program, do not use the settings in the mail.rc file;
-N: Do not display the title of the message when reading it;
-S < mail subject >: Specifies the subject of the mail;
-U < user account >: read the mail of the specified user;
-v: When executed, displays detailed information.
1) No message body
Mail-s subject to address
Mail-s "test" [email protected]
2) With message body
Mail - s subject to file (body. Txt)
Mail - s "mail subject" [email protected] < / data / findyou.txt
Echo "message body" | mail - s subject address
Echo "message body content" | mail - s "message subject" [email protected]
Cat message body.txt | mail - s message subject to address
Cat / data / findyou.txt | mail - s "mail subject" [email protected]
3) With accessories
Mail - s "subject" to - a attachment < file (message body. Txt)
Mail - s "mail subject" [email protected] - A / data / findyou.txt < / data / findyou.txt
Uuencode / data / findyou.txt | mail - s "mail subject" [email protected]
Generation of message body:
(1) Interactive input;
A single line of dots (.) can indicate the end of the text; a Ctrl + D submission can also indicate the end of the text;
Send emails
[[email protected] ~]# mail -s ‘hello hdfs‘ hdfs
How are you these days?
. the end of the dot indicates the end; then enter
EOT
[[email protected] ~]#
Receive mail
Mail
#Enter the number to view the corresponding email
Q ා Q exit
(2) Redirection by input;
Mail - s' hello HDFS' HDFS < file.txt (body content)
(3) Through pipes;
cat file.txt | mail -s ‘hello hdfs‘ hdfs

4. Scripts

# vim sendmail.sh
/bin/bash!
#author:findyou
Help () {
echo "eg: $0 [Subject] [address] [content_file] [file]"
Echo ""
Exit 1
}
if [ ! -n "$1" ] ; then
Help
Fi
cDate=`date +%Y%m%d`
if [ ! -n "$2" ] ; then
Help
Else
Mail_to=$2
echo "      Send Mail to ${mail_to}"
Fi
if [ ! -n "$4" ] ; then
mail -s $1 ${mail_to}<$3
Else
mail -s $1 -a $4 ${mail_to}<$3
Fi
Use
# ./sendmail.sh  test  [email protected]  abc.txt
Send Mail to [email protected]
Note: it is recommended to use the command directly. If there is a script, it is only for printing and displaying relevant information. This is unnecessary.

5. Questions

Send mail:
#Echo 'this is the message title' | mail - s' this is the message content '[email protected]
Exception occurred:
# send-mail: fatal: parameter inet_interfaces: no local interface found for ::1
View postfix logs in CentOS
# more  /var/log/maillog
postfix: fatal: parameter inet_interfaces: no local interface found for ::1
# vi /etc/postfix/main.cf
inet_interfaces = localhost
inet_protocols = all
Change to:
inet_interfaces = all
inet_protocols = all
Restart: (which to install and which to restart)
# systemctl restart sendmail.service
# systemctl restart postfix.service 

This article is from the "Caterpillar Small Smelly Smelly" blog, please make sure to keep this source http://moerjinrong.blog.51cto.com/11124564/1966812

Linux email Mail