Install Postfix2016/12/12 |
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Install Postfix to configure SMTP server.
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| [1] | Install Postfix. |
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[root@mail ~]# dnf -y install postfix
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| [2] | This example shows to configure SMTP-Auth to use Dovecot's SASL function. |
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[root@mail ~]#
vi /etc/postfix/main.cf # line 95: uncomment and specify hostname myhostname = mail.srv.world
# line 102: uncomment and specify domain name mydomain = srv.world
# line 118: uncomment myorigin = $mydomain # line 135: change inet_interfaces = all
# line 138: change it if use only IPv4 inet_protocols = ipv4
# line 183: add mydestination = $myhostname, localhost.$mydomain, localhost , $mydomain
# line 283: uncomment and specify your local network mynetworks = 127.0.0.0/8, 10.0.0.0/24
# line 438: uncomment (use Maildir) home_mailbox = Maildir/ # line 593: add smtpd_banner = $myhostname ESMTP
# add follows to the end # limit an email size for 10M message_size_limit = 10485760 # limit a mailbox for 1G mailbox_size_limit = 1073741824
# 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_recipient_restrictions = permit_mynetworks, permit_auth_destination, permit_sasl_authenticated, reject systemctl start postfix [root@mail ~]# systemctl enable postfix |
| [3] | If SELinux is enabled, change policy like follows. |
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[root@mail ~]#
vi postfix-local.te # create new
module postfix-local 1.0;
require {
type tmpfs_t;
type sendmail_t;
type postfix_local_t;
type postfix_cleanup_t;
type postfix_smtp_t;
type postfix_smtpd_t;
type postfix_qmgr_t;
type postfix_master_t;
type postfix_pickup_t;
class lnk_file read;
}
allow sendmail_t tmpfs_t:lnk_file read;
allow postfix_local_t tmpfs_t:lnk_file read;
allow postfix_cleanup_t tmpfs_t:lnk_file read;
allow postfix_smtp_t tmpfs_t:lnk_file read;
allow postfix_smtpd_t tmpfs_t:lnk_file read;
allow postfix_pickup_t tmpfs_t:lnk_file read;
allow postfix_master_t tmpfs_t:lnk_file read;
allow postfix_qmgr_t tmpfs_t:lnk_file read;
checkmodule -m -M -o postfix-local.mod postfix-local.te checkmodule: loading policy configuration from postfix-local.te checkmodule: policy configuration loaded checkmodule: writing binary representation (version 17) to postfix-local.mod [root@mail ~]# semodule_package --outfile postfix-local.pp --module postfix-local.mod [root@mail ~]# semodule -i postfix-local.pp |
| [4] | If Firewalld is running, allow SMTP service. SMTP uses 25/TCP. |
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[root@mail ~]# firewall-cmd --add-service=smtp --permanent success [root@mail ~]# firewall-cmd --reload success |
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