Email Postfix - Is it possible to automatically append sender name to all sent mails?

Maybe @Tracy Perry who has more experience with postfix can shed some light ?

 

@BobbyWibowo ok one way you can do this assuming you used smtp_generic_maps to set the from email address is to edit /etc/passwd entry for root user's 5th column (Understanding /etc/passwd File Format)

from

Code:

root:x:0:0:root:/root:/bin/bas

to whatever you want the send name to be i.e. myroot is custom sender from name

Code:

root:x:0:0:myroot:/root:/bin/bas

this example used a postfix generic map for

Code:

root yourusername@yourdomain.com

and ended up like

 

using CentOS 6 or 7 ? for CentOS 7 has another option in /etc/yum/yum-cron.conf
messages either go to stdio or email, default is stdio so for emails set emit_via = email

Code:

# How to send messages.  Valid options are stdio and email.  If
# emit_via includes stdio, messages will be sent to stdout; this is useful
# to have cron send the messages.  If emit_via includes email, this
# program will send email itself according to the configured options.
# If emit_via is None or left blank, no messages will be sent.
emit_via = stdio

and already has an email from field

Code:

[email]
# The address to send email messages from.
email_from = root@localhost

# List of addresses to send messages to.
email_to = root

# Name of the host to connect to to send email messages.
email_host = localhost

on CentOS 6 version of yum-cron no such native email from option but you can probably hack the file at /etc/cron.daily/0yum.cron near the end

Code:

if [ ! -z "$MAILTO" ] && [ -x /bin/mail ]; then
# if MAILTO is set, use mail command (ie better than standard mail with cron output)
  [ -s "$YUMTMP" ] && mail -s "System update: $SYSTEMNAME" $MAILTO < $YUMTMP
else
# default behavior is to use cron's internal mailing of output from cron-script
  cat $YUMTMP
fi 

the section

Code:

mail -s "System update: $SYSTEMNAME" $MAILTO

can add -r EMAILFROMADDR, so if you wanted to send from same address as to address already filled out

Code:

mail -r $MAILTO -s "System update: $SYSTEMNAME" $MAILTO