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Configure Postfix SMTP service

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#  yum  install  postfix*

Edit main.cf:
#  vim  /etc/postfix/main.cf

Line 75 & 83 (enable and edit):

myhostname  =  abc.com

mydomain  =  com

Line 99 (enable):

myorigin  =  $mydomain

Line 116 & 119 (enable and edit):

inet_interfaces  =  all

inet_protocols  =  ipv4

Line 165 (enable):

mydestination  =  $myhostname, localhost.$mydomain, localhost, $mydomain

Line 264 (enable and edit):

mynetworks  =  192.168.7.0/24, 127.0.0.0/8

Line 419 (enable):

home_mailbox  =  Maildir/

Line 545 & 546 (enable and edit):

header_checks = regexp:/etc/postfix/header_checks

body_checks = regexp:/etc/postfix/body_checks

Line 571 (enable):

smtpd_banner  =  $myhostname  ESMTP

Add following 7 lines at the end of file (SMTP-auth settings):

smtpd_sasl_type  =  dovecot

smtpd_sasl_path  =  private/auth

smtpd_sasl_auth_enable  =  yes

smtpd_sasl_security_options  =  noanonymous

smtpd_sasl_local_domain  =  $myhostname

smtpd_client_restrictions  =  permit_mynetworks,reject_unknown_client,permit

smtpd_recipient_restrictions  =  permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject

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