Hi,
Not sure why this happend. Here is my main.cf
`# ————————————————————————–

Please create a file “extra.cf” for persistent overrides to main.cf

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biff = no
append_dot_mydomain = no
smtpd_tls_cert_file = /etc/ssl/mail/cert.pem
smtpd_tls_key_file = /etc/ssl/mail/key.pem
smtpd_use_tls = yes
smtp_tls_note_starttls_offer = yes
tls_server_sni_maps = hash:/opt/postfix/conf/sni.map
smtp_tls_received_header = yes
smtpd_tls_received_header = yes
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_relay_restrictions = permit_mynetworks,
permit_sasl_authenticated,
defer_unauth_destination

alias maps are auto-generated in postfix.sh on startup

alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
relayhost =
mynetworks_style = subnet
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
bounce_queue_lifetime = 1d
broken_sasl_auth_clients = yes
disable_vrfy_command = yes
maximal_backoff_time = 1800s
maximal_queue_lifetime = 5d
delay_warning_time = 4h
message_size_limit = 104857600
milter_default_action = tempfail
milter_protocol = 6
minimal_backoff_time = 300s
plaintext_reject_code = 550
postscreen_access_list = permit_mynetworks,
cidr:/opt/postfix/conf/custom_postscreen_whitelist.cidr,
cidr:/opt/postfix/conf/postscreen_access.cidr,
tcp:127.0.0.1:10027
postscreen_bare_newline_enable = no
postscreen_blacklist_action = drop
postscreen_cache_cleanup_interval = 24h
postscreen_cache_map = proxy:btree:$data_directory/postscreen_cache
postscreen_dnsbl_action = enforce
postscreen_dnsbl_sites = wl.mailspike.net=127.0.0.[18;19;20]-2
hostkarma.junkemailfilter.com=127.0.0.1-2
list.dnswl.org=127.0.[0..255].0-2
list.dnswl.org=127.0.[0..255].1-4
list.dnswl.org=127.0.[0..255].2-6
list.dnswl.org=127.0.[0..255].3-8
ix.dnsbl.manitu.net2
bl.spamcop.net2
bl.suomispam.net2
hostkarma.junkemailfilter.com=127.0.0.23
hostkarma.junkemailfilter.com=127.0.0.42
hostkarma.junkemailfilter.com=127.0.1.21
backscatter.spameatingmonkey.net2
bl.ipv6.spameatingmonkey.net2
bl.spameatingmonkey.net2
b.barracudacentral.org=127.0.0.27
bl.mailspike.net=127.0.0.25
bl.mailspike.net=127.0.0.[10;11;12]4
dnsbl.sorbs.net=127.0.0.108
dnsbl.sorbs.net=127.0.0.56
dnsbl.sorbs.net=127.0.0.73
dnsbl.sorbs.net=127.0.0.82
dnsbl.sorbs.net=127.0.0.62
dnsbl.sorbs.net=127.0.0.92
zen.spamhaus.org=127.0.0.[10;11]8
zen.spamhaus.org=127.0.0.[4..7]6
zen.spamhaus.org=127.0.0.34
zen.spamhaus.org=127.0.0.23
postscreen_dnsbl_threshold = 6
postscreen_dnsbl_ttl = 5m
postscreen_greet_action = enforce
postscreen_greet_banner = $smtpd_banner
postscreen_greet_ttl = 2d
postscreen_greet_wait = 3s
postscreen_non_smtp_command_enable = no
postscreen_pipelining_enable = no
proxy_read_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sasl_passwd_maps_transport_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_mbr_access_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf,
$sender_dependent_default_transport_maps,
$smtp_tls_policy_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,
$sender_bcc_maps,
$recipient_bcc_maps,
$recipient_canonical_maps,
$relocated_maps,
$transport_maps,
$mynetworks,
$smtpd_sender_login_maps,
$smtp_sasl_password_maps
queue_run_delay = 300s
relay_domains = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_relay_domain_maps.cf
relay_recipient_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_relay_recipient_maps.cf
sender_dependent_default_transport_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sender_dependent_default_transport_maps.cf
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtp_tls_cert_file = /etc/ssl/mail/cert.pem
smtp_tls_key_file = /etc/ssl/mail/key.pem
smtp_tls_loglevel = 1
smtp_dns_support_level = dnssec
smtp_tls_security_level = may
smtpd_data_restrictions = reject_unauth_pipelining, permit
smtpd_delay_reject = yes
smtpd_error_sleep_time = 10s
smtpd_hard_error_limit = ${stress?1}${stress:5}
smtpd_helo_required = yes
smtpd_proxy_timeout = 600s
smtpd_recipient_restrictions = check_recipient_mx_access proxy:mysql:/opt/postfix/conf/sql/mysql_mbr_access_maps.cf,
permit_sasl_authenticated,
permit_mynetworks,
check_recipient_access proxy:mysql:/opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf,
reject_invalid_helo_hostname,
reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = inet:dovecot:10001
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_sender_acl.cf
smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch,
permit_mynetworks,
permit_sasl_authenticated,
reject_unlisted_sender,
reject_unknown_sender_domain
smtpd_soft_error_limit = 3
smtpd_tls_auth_only = yes
smtpd_tls_dh1024_param_file = /etc/ssl/mail/dhparams.pem
smtpd_tls_eecdh_grade = auto
smtpd_tls_exclude_ciphers = ECDHE-RSA-RC4-SHA, RC4, aNULL, DES-CBC3-SHA, ECDHE-RSA-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA
smtpd_tls_loglevel = 1

Mandatory protocols and ciphers are used when a connections is enforced to use TLS

Does not apply to enforced incoming TLS settings per mailbox

smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
lmtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
#smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
smtpd_tls_mandatory_ciphers = high

smtp_tls_protocols = !SSLv2, !SSLv3
lmtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_protocols = !SSLv2, !SSLv3

smtpd_tls_security_level = may
tls_preempt_cipherlist = yes
tls_ssl_options = NO_COMPRESSION, NO_RENEGOTIATION
virtual_alias_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_alias_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_resource_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_spamalias_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_alias_domain_maps.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/vmail/
virtual_mailbox_domains = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_domains_maps.cf

– moved to rspamd on 2021-06-01

#recipient_bcc_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_recipient_bcc_maps.cf
#sender_bcc_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sender_bcc_maps.cf
recipient_canonical_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_recipient_canonical_maps.cf
recipient_canonical_classes = envelope_recipient
virtual_mailbox_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 104
virtual_transport = lmtp:inet:dovecot:24
virtual_uid_maps = static:5000
smtpd_milters = inet:rspamd:9900
non_smtpd_milters = inet:rspamd:9900
milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
mydestination = localhost.localdomain, localhost
smtp_address_preference = any
smtp_sender_dependent_authentication = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sasl_passwd_maps_sender_dependent.cf
smtp_sasl_security_options =
smtp_sasl_mechanism_filter = plain, login
smtp_tls_policy_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_tls_policy_override_maps.cf

smtp_header_checks = pcre:/opt/postfix/conf/anonymize_headers.pcre

mail_name = Postcow

local_transport map catches local destinations and prevents routing local dests when the next map would route “*”

Use custom_transport.pcre for custom transports

transport_maps = pcre:/opt/postfix/conf/custom_transport.pcre,
pcre:/opt/postfix/conf/local_transport,
proxy:mysql:/opt/postfix/conf/sql/mysql_relay_ne.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_transport_maps.cf
smtp_sasl_auth_soft_bounce = no
postscreen_discard_ehlo_keywords = silent-discard, dsn
compatibility_level = 2
smtputf8_enable = no

Define protocols for SMTPS and submission service

submission_smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtps_smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
parent_domain_matches_subdomains = debug_peer_list,fast_flush_domains,mynetworks,qmqpd_authorized_clients

DO NOT EDIT ANYTHING BELOW

User overrides

myhostname = mymail.xxx.net
inet_protocols = ipv4
smtp_tls_security_level = may
smtpd_tls_security_level = may
smtp_tls_note_starttls_offer = yes
`