希望你一切都好！我是非托管 VPS 的新手，我正在使用 CentOS 8 和 AaPanel 运行 Contabo 服务器，我的问题是与 Outlook 的 SMTP 连接，我的服务器仅接受带有 STARTTLS 或没有任何加密的 SMPT 连接，但我想接受带有 TLS 的连接，我正在使用 Postfix 和 Dovecot 进行电子邮件管理，我正在附加我的配置文件，提前谢谢大家。
注意：POP3 和 IMAP 运行正常；SMTP 也运行正常，但在 587 端口没有加密；我不得不删除一些注释行才能在这里发布问题。
dovecot配置文件
protocols = imap pop3 lmtp
#listen = *, ::
#base_dir = /var/run/dovecot/
#instance_name = dovecot
# Greeting message for clients.
#login_greeting = Dovecot ready.
#login_trusted_networks =
# Space separated list of login access check sockets (e.g. tcpwrap)
#login_access_sockets =
#auth_proxy_self =
#verbose_proctitle = no
#shutdown_clients = yes
#doveadm_socket_path = doveadm-server
#import_environment = TZ
dict {
#quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
#expire = sqlite:/etc/dovecot/dovecot-dict-sql.conf.ext
}
namespace inbox {
inbox = yes
mailbox Trash {
auto = subscribe # autocreate and autosubscribe the Trash mailbox
special_use = \Trash
}
mailbox Sent {
auto = subscribe # autocreate and autosubscribe the Sent mailbox
special_use = \Sent
}
mailbox Junk {
auto = subscribe # autocreate and autosubscribe the Sent mailbox
special_use = \Junk
}
mailbox Drafts {
auto = subscribe
special_use = \Drafts
}
}
!include conf.d/*.conf
!include_try local.conf
postfix/main.cf
compatibility_level = 2
#soft_bounce = no
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
#default_privs = nobody
#myhostname = host.domain.tld
#myhostname = virtual.domain.tld
#mydomain = domain.tld
#myorigin = $myhostname
#myorigin = $mydomain
# RECEIVING MAIL
#inet_interfaces = all
#inet_interfaces = $myhostname
#inet_interfaces = $myhostname, localhost
inet_interfaces = all
# Enable IPv4, and IPv6 if supported
#inet_protocols = ipv4
#proxy_interfaces =
#proxy_interfaces = 1.2.3.4
mydestination =
#mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
#mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
# mail.$mydomain, www.$mydomain, ftp.$mydomain
#local_recipient_maps = unix:passwd.byname $alias_maps
#local_recipient_maps = proxy:unix:passwd.byname $alias_maps
#local_recipient_maps =
unknown_local_recipient_reject_code = 550
#mynetworks_style = class
#mynetworks_style = subnet
#mynetworks_style = host
#mynetworks = 168.100.189.0/28, 127.0.0.0/8
#mynetworks = $config_directory/mynetworks
#mynetworks = hash:/etc/postfix/network_table
#relay_domains = $mydestination
# INTERNET OR INTRANET
#relayhost = $mydomain
#relayhost = [gateway.my.domain]
#relayhost = [mailserver.isp.tld]
#relayhost = uucphost
#relayhost = [an.ip.add.ress]
#relay_recipient_maps = hash:/etc/postfix/relay_recipients
#in_flow_delay = 1s
#alias_maps = dbm:/etc/aliases
alias_maps = hash:/etc/aliases
#alias_maps = hash:/etc/aliases, nis:mail.aliases
#alias_maps = netinfo:/aliases
#alias_database = dbm:/etc/aliases
#alias_database = dbm:/etc/mail/aliases
alias_database = hash:/etc/aliases
#alias_database = hash:/etc/aliases, hash:/opt/majordomo/aliases
#recipient_delimiter = +
#home_mailbox = Mailbox
#home_mailbox = Maildir/
#mail_spool_directory = /var/mail
#mail_spool_directory = /var/spool/mail
#mailbox_command = /some/where/procmail
#mailbox_command = /some/where/procmail -a "$EXTENSION"
#mailbox_transport = cyrus
#fallback_transport = lmtp:unix:/var/lib/imap/socket/lmtp
#fallback_transport =
#luser_relay = [email protected]
#luser_relay = [email protected]
#luser_relay = admin+$local
#header_checks = regexp:/etc/postfix/header_checks
#fast_flush_domains = $relay_domains
#smtpd_banner = $myhostname ESMTP $mail_name
#smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)
#local_destination_concurrency_limit = 2
#default_destination_concurrency_limit = 20
debug_peer_level = 2
#debug_peer_list = 127.0.0.1
#debug_peer_list = some.domain
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
# sample_directory: The location of the Postfix sample configuration files.
# This parameter is obsolete as of Postfix 2.1.
#
sample_directory = /usr/share/doc/postfix3-3.4.9/samples
# readme_directory: The location of the Postfix README files.
#
readme_directory = /usr/share/doc/postfix3-3.4.9/README_FILES
meta_directory = /etc/postfix
shlib_directory = /usr/lib/postfix
myhostname = kitnetcaioba.com.br
virtual_mailbox_domains = sqlite:/etc/postfix/sqlite_virtual_domains_maps.cf
virtual_alias_maps= sqlite:/etc/postfix/btrule.cf
virtual_mailbox_maps = sqlite:/etc/postfix/sqlite_virtual_mailbox_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_mailbox_maps.cf
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_use_tls = yes
smtp_tls_security_level = may
smtpd_tls_security_level = may
virtual_transport = lmtp:unix:private/dovecot-lmtp
smtpd_milters = inet:127.0.0.1:11332
non_smtpd_milters = inet:127.0.0.1:11332
#Adicionados 2 linhas proximas
smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
smtp_tls_mandatory_protocols=!SSLv2,!SSLv3
milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
milter_protocol = 6
milter_default_action = accept
message_size_limit = 102400000
smtp_tls_CAfile = /root/rootCACert.pem
smtpd_tls_CAfile = /root/rootCACert.pem
smtpd_tls_key_file = /www/server/panel/plugin/mail_sys/cert/mail.kitnetcaioba.com.br/fullchain.pem
smtpd_tls_cert_file = /www/server/panel/plugin/mail_sys/cert/mail.kitnetcaioba.com.br/privkey.pem
#smtpd_tls_key_file = /etc/pki/tls/private/postfix.key
#smtpd_tls_cert_file = /etc/pki/tls/certs/postfix.pem
smtpd_tls_dh1024_param_file = /etc/pki/tls/private/postfix.dh.param
#ssl_cert = < /www/server/panel/plugin/mail_sys/cert/kitnetcaioba.com.br/fullchain.pem
#ssl_key = < /www/server/panel/plugin/mail_sys/cert/kitnetcaioba.com.br/privkey.pem
#smtpd_tls_chain_files = /etc/pki/dovecot/private/dovecot.pem,/etc/pki/dovecot/certs#/dovecot.pem
#tls_server_sni_maps = hash:/etc/postfix/vmail_ssl.map
postfix/master.cf
smtp inet n - n - - smtpd
#smtp inet n - n - 1 postscreen
#smtpd pass - - n - - smtpd
#dnsblog unix - - n - 0 dnsblog
#tlsproxy unix - - n - 0 tlsproxy
submission inet n - n - - smtpd
-o syslog_name=postfix/submission
# Comentamos -o smtpd_tls_security_level=may
# Quando eu altero a linha abaixo o Outlook para .
-o smtpd_enforce_tls=no
-o smtpd_tls_security_level=
-o smtpd_tls_auth_only=no
# -o smtpd_sasl_auth_enable=yes
#COmentamos -o smtpd_tls_auth_only=yes
# -o smtpd_reject_unlisted_recipient=no
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
# Original -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
-o smtpd_recipient_restrictions=permit_sasl_authenticated
-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# Original Comentamos -o milter_macro_daemon_name=ORIGINATING
smtps inet n - n - - smtpd
-o syslog_name=postfix/smtps
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
-o milter_macro_daemon_name=ORIGINATING
#628 inet n - n - - qmqpd
pickup unix n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - n 1000? 1 tlsmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
verify unix - - n - 1 verify
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - n - - smtp
relay unix - - n - - smtp
-o syslog_name=postfix/$service_name
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error unix - - n - - error
retry unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
anvil unix - - n - 1 anvil
scache unix - - n - 1 scache