我在我的 Debian 7 服务器上设置了一个简单的 postfix/doecot 来发送和接收一些邮件。接收电子邮件效果很好，但我无法发送任何邮件。我的 Outlook 说他无法连接到服务器。我几乎尝试了我在互联网上找到的任何东西，但没有任何帮助。我希望这里有人能找到我的错误并帮助我解决问题。
如果我尝试“ telnet mail.mydomain.de 25 ”，它就会超时。
telnet mail.mydomain.de 25
Trying xxx.xxx.xxx.xx...
Connected to mail.mydomain.de.
Escape character is '^]'.
220 mail.mydomain.de ESMTP
421 4.4.2 mail.mydomain.de Error: timeout exceeded
Connection closed by foreign host.
端口 587 和 8080 的结果相同
这是我的main.cf：
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname
smtpd_banner = $myhostname ESMTP
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
readme_directory = no
##SASL##
#smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $mydomain
broken_sasl_auth_clients = yes
##TLS##
smtpd_use_tls=yes
smtpd_tls_security_level = may
smtpd_tls_auth_only = no
smtpd_tls_cert_file = /etc/apache2/SSLcerts/www_domain_de.crt
smtpd_tls_key_file = /etc/apache2/SSLcerts/domain.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_received_header = yes
tls_random_source = dev:/dev/urandom
smtpd_tls_security_level = may
smtp_tls_security_level = may
# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = mail.mydomain.de
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydomain = mydomain.de
myorigin = $mydomain
mydestination = localhost, $mydomain
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
recipient_delimiter = +
inet_interfaces = all
virtual_mailbox_domains = /etc/postfix/virtual_domains
virtual_mailbox_base = /var/mail/vhosts
virtual_mailbox_maps = hash:/etc/postfix/vmailbox
virtual_alias_maps = hash:/etc/postfix/virtual_alias
virtual_minimum_uid = 100
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_transport = virtual
dovecot_destination_recipient_limit = 0
mailbox_size_limit = 0
##restrictions##
#smtpd_helo_required=yes
strict_rfc821_envelopes = yes
disable_vrfy_command = yes
smtpd_delay_reject = yes
##limit rate##
anvil_rate_time_unit = 60s
smtpd_client_connection_rate_limit = 5
smtpd_client_connection_count_limit = 5
smtpd_error_sleep_time = 5s
smtpd_soft_error_limit = 2
smtpd_hard_error_limit = 3
##################
smtpd_helo_restrictions= reject_non_fqdn_hostname,
reject_invalid_helo_hostname,
reject_unknown_helo_hostname
smtpd_client_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unknown_client_hostname,
reject_unauth_pipelining,
reject_rbl_client zen.spamhaus.org
smtpd_sender_restrictions = reject_non_fqdn_sender,
reject_unknown_sender_domain
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unauth_destination,
reject_unauth_pipelining,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client cbl.abuseat.org,
reject_rbl_client dul.dnsbl.sorbs.net
smtpd_recipient_limit = 250
broken_sasl_auth_clients = yes
#message_size_limit = 120480000
##remove IP header##
# requires postfix-pcre (apt-get install postfix-pcre)
#header_checks has the following content:
#/^\s*(Received: from)[^\n]*(.*)/ REPLACE $1 [127.0.0.1] (localhost [127.0.0.1])$2
#
#smtp_header_checks = pcre:/etc/postfix/header_checks
这是master.cf
smtp inet n - - - - smtpd
8080 inet n - - - - smtpd
smtps inet n - - - - smtpd
submission inet n - n - - smtpd
pickup fifo n - - 60 1 pickup
cleanup unix n - - - 0 cleanup
qmgr fifo n - n 300 1 qmgr
tlsmgr unix - - - 1000? 1 tlsmgr
rewrite unix - - - - - trivial-rewrite
bounce unix - - - - 0 bounce
defer unix - - - - 0 bounce
trace unix - - - - 0 bounce
verify unix - - - - 1 verify
flush unix n - - 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - - - - smtp
relay unix - - - - - smtp
showq unix n - - - - showq
error unix - - - - - error
retry unix - - - - - error
discard unix - - - - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - - - - lmtp
anvil unix - - - - 1 anvil
scache unix - - - - 1 scache
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${recipient}
我真的希望有人找到问题，因为我需要这个邮件服务器。