Mail Server Setup

Procedure To Enable mailx on Zmanda Server for CentOS, RHEL, OEL, Fedora and, Suse Linux Systems:


1.  Install mailx package   

 #yum install mailx  

2. Create a soft link to mailx from mail.  

     #ln -s /bin/mailx /bin/mail  

3.  Update the /etc/mail.rc configuration as below:   

#append the following line in mail.rc   

# set smtp=smtp://smtp.server.tld:port_number  


# tell mailx that it needs to authorise  

set smtp-auth=login  

set smtp-use-starttls  

# set the user for SMTP  

# set [email protected]  

set [email protected] (user account)  

set [email protected] (user account)  

# set the password for authorisation  

set smtp-auth-password= “PASSWORD of user account”  

set nss-config-dir=/etc/pki/nssdb/  

set ssl-verify=ignore  


4. To test the functionality:   


#echo "Your message" | mail -s "Message Subject" [email protected]  


Procedure To Enable mailx on Zmanda Server for Ubuntu & Debian Linux Systems


1. apt-get install postfix mailutils 

2. root@U16:~# vi /etc/postfix/  

             Append the following line  

relayhost = []:25  

mynetworks =  

inet_interfaces = loopback-only  

smtp_use_tls = yes  

smtp_always_send_ehlo = yes  

smtp_sasl_auth_enable = yes  

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd  

smtp_sasl_security_options = noanonymous  

smtp_sasl_tls_security_options = noanonymous  

smtp_tls_security_level = encrypt  

smtp_generic_maps = hash:/etc/postfix/generic  


3. postfix SASL credentials configuration:  

root@U16:~# vi /etc/postfix/sasl_passwd  

Append following info.  

[]:25 user@domainname:password  


4. A Postfix lookup table must now be generated from the sasl_passwd text file by running the following command.  

root@U16:~# postmap /etc/postfix/sasl_passwd  

Now change permission for this file  

root@U16:~# chown root:postfix /etc/postfix/sasl_passwd  

root@U16:~# chmod 640 /etc/postfix/sasl_passwd  


5. Next, we need to configure generic file in order to be able to send emails as a valid user (this is required for Office365).  

root@U16:~# vi /etc/postfix/generic  

Append following info.  

@hostname [email protected]  


Save and exit from file.  

root@U16:~# chown root:root /etc/postfix/generic  

root@U16:~# chmod 0600 /etc/postfix/generic  

root@U16:~# postmap /etc/postfix/generic  


6. Now Change alias root to your email address.  

root@U16:~ vi /etc/aliases  


Make the changes like below:  

mailer-daemon:  postmaster  

postmaster:     root  

root:           [email protected]  


7.  Run command newaliases to take effect.  

root@U16:~ newaliases  

root@U16:~# systemctl restart postfix.service  


8. Send a test email using the command below:  


echo "This is the body of the email" | mailx -s "This is the subject(E-Mail from SMTP Relay)     line" [email protected] -a "FROM: [email protected]