/etc/postfix/main.cf

myhostname = mail.tritoniada.tk
mydestination = localhost, localhost.localdomain
mynetworks = 127.0.0.0/8
mailbox_size_limit = 0
inet_interfaces = all
inet_protocols = ipv4
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
append_dot_mydomain = no
readme_directory = no

# TLS configuration
smtpd_use_tls = yes
smtpd_tls_cert_file=/etc/postfix/certificate/smtpd.pem
smtpd_tls_key_file=/etc/postfix/certificate/smtpd.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_loglevel = 0
smtpd_tls_received_header = yes

# MySQL configuration
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysqlconf/virtual_forwardings.cf, mysql:/etc/postfix/mysqlconf/virtual_email2email.cf
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysqlconf/virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysqlconf/virtual_mailboxes.cf
virtual_mailbox_base = /home/vmail
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000

# SASL configuration
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
broken_sasl_auth_clients = yes

# SMTPD configuration
smtpd_delay_reject = yes

smtpd_client_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated

smtpd_helo_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_invalid_helo_hostname,
    reject_non_fqdn_helo_hostname,
    reject_unknown_helo_hostname

smtpd_sender_restrictions =
    permit_mynetworks,
    reject_non_fqdn_sender,
    permit_sasl_authenticated

smtpd_recipient_restrictions =
    reject_non_fqdn_recipient,
    reject_unknown_recipient_domain,
    reject_unlisted_recipient,
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_unknown_sender_domain,
    reject_rbl_client sbl.spamhaus.org,
    reject_rbl_client dnsbl-1.uceprotect.net,
    reject_rbl_client dnsbl.sorbs.net,
    reject_rbl_client ix.dnsbl.manitu.net,
    reject_rbl_client bl.spamcop.net,
    reject_rbl_client access.redhawk.org,
    reject_rbl_client bl.deadbeef.com,
    reject_rbl_client dnsbl.cyberlogic.net,
    reject_rbl_client dul.ru,
    reject_rbl_client korea.services.net,
    reject_unknown_client_hostname,
    reject_unauth_pipelining,
    reject_unauth_destination

smtpd_relay_restrictions =
    permit_mynetworks
    permit_sasl_authenticated
    defer_unauth_destination

smtpd_data_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_unauth_pipelining

smtpd_end_of_data_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_multi_recipient_bounce

proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
virtual_transport = dovecot

alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases