Send Mail from SUSE Linux(Outlook)

Mail from SUSE Linux(Outlook)

#Requirements and Intro

In this, we will use Postfix as our MTA (mail transfer agent). 

  1. Postfix is a free, open-source, actively maintained, and highly secure mail transfer agent.

  2. Make sure port 25 and 587 is open or not.

  3. In December of 1998, R. Gellens and J. Klensin submitted RFC 2476 in support of adding a new specification for internet email communications. The RFC proposed a split of the traditional massage submission and message relay concept. The RFC defined that message submission should occur over port 587 to ensure new policy and security requirements don't interfere with the traditional relay traffic over message relay port 25.

  4. this can perfectly work for (SLES 11 SP4)(SLES 12 SP3)(SLES 15) as per test

1. Install Required Software

zypper update && zypper install postfix mailx cyrus-sasl

For other Linux flavor, we can change the word zypper  with the respected installer

Note: Before update ensure with administrator

Or just install postfix by typing the command below.

zypper install postfix mailx cyrus-sasl

 

2. shut down postfix before configure.

rcpostfix stop


3. Configure outlook Authentication

vim /etc/postfix/sasl_passwd

In this, I  used  vim file editor if u can use any other file editors also

 [smtp.office365.com]:587    office365AccountEmailAddress:password

Replace office365 with your outlook email and password with your password.

Note: Put a blank line at the end of the file



Save and close the file. Your Gmail password is stored as plaintext, so make the file accessible only by root:

 chmod 600 /etc/postfix/sasl_passwd

for the above command will change the file permeation to only by root/user

4. Process Password File

postmap hash:/etc/postfix/sasl_passwd

Then check it out /etc/postfix for the sasl_passwd.db file is it created or not.


5. Configure Postfix

Minimum Requirements to get Postfix relay to Office365 to work

vim /etc/postfix/main.cf

# sasl and tls

Modify or Add(only if line not found ) the following values:

relayhost = [smtp.office365.com]:587

smtp_sasl_auth_enable = yes

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

smtp_sasl_tls_security_options = noanonymous

smtp_use_tls = yes

It also requires that the Postfix master process configuration file master.cf be modified. Open it for editing:


vim /etc/postfix/master.cf


Locate the line below and uncomment it:


#tlsmgr unix - - n 1000? 1 tlsmgr

Save and close the file.


5. Restart Postfix

Rcpostfix restart


6. Send A  Email


mail –s “test subject” –r sendermail.com  recevermail.com


Press CTRL+D to send mail
Location: Bengaluru, Karnataka, India

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