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我使用我的 smtp 对网站 mxtoolbox.com 进行测试并收到此错误：
220 hostname.example.com ESMTP [702 ms]
EHLO MXTB-PWS3.mxtoolbox.com
250-mail.example.com
250-PIPELINING
250-SIZE 20480000
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN [671 ms]
MAIL FROM: [email protected]
250 2.1.0 Ok [671 ms]
RCPT TO: [email protected]
454 4.7.1 [email protected]: Relay access denied [671 ms]
这是我的 postfix 文件主配置文件：
#
# Postfix master process configuration file. For details on the format
# of the file, see the Postfix master(5) manual page.
#
# ***** Unused items removed *****
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd
submission inet n - n - - smtpd
# -o content_filter=smtp-amavis:127.0.0.1:10024
# -o receive_override_options=no_address_mappings
pickup fifo n - n 60 1 pickup
-o content_filter=
-o receive_override_options=no_header_body_checks
cleanup unix n - n - 0 cleanup
qmgr fifo n - n 300 1 qmgr
#qmgr fifo 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
smtp unix - - n - - smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - n - - smtp
-o fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error 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
#
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
# ====================================================================
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$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=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
#
# spam/virus section
#
smtp-amavis unix - - y - 2 smtp
-o smtp_data_done_timeout=1200
-o disable_dns_lookups=yes
-o smtp_send_xforward_command=yes
127.0.0.1:10025 inet n - y - - smtpd
-o content_filter=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks=127.0.0.0/8
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o receive_override_options=no_header_body_checks
-o smtpd_helo_required=no
-o smtpd_client_restrictions=
-o smtpd_restriction_classes=
-o disable_vrfy_command=no
-o strict_rfc821_envelopes=yes
#
# Dovecot LDA
dovecot unix - n n - - pipe
flags=DRhu user=vmail:mail argv=/usr/libexec/dovecot/deliver -d ${recipient}
#
# Vacation mail
vacation unix - n n - - pipe
flags=Rq user=vacation argv=/var/spool/vacation/vacation.pl -f ${sender} -- ${recipient}
这是我的主配置文件：
# postfix config file
# uncomment for debugging if needed
soft_bounce=yes
# postfix main
mail_owner = postfix
setgid_group = postdrop
delay_warning_time = 4
# postfix paths
html_directory = no
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
queue_directory = /var/spool/postfix
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.2.2/samples
readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES
# network settings
inet_interfaces = all
mydomain = hostname.example.com
myhostname = hostname.example.com
mynetworks = 127.0.0.1, MY.ADRESS.SERVER.IP
mydestination = localhost.$mydomain, localhost
relay_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-relay_domains_maps.cf
# mail delivery
recipient_delimiter = +
# mappings
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
#transport_maps = hash:/etc/postfix/transport
#local_recipient_maps =
# virtual setup
virtual_alias_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_alias_maps.cf,
regexp:/etc/sentora/configs/postfix/virtual_regexp
virtual_mailbox_base = /var/sentora/vmail
virtual_mailbox_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_domains_maps.cf
virtual_mailbox_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_mailbox_maps.cf
virtual_minimum_uid = 998
virtual_uid_maps = static:998
virtual_gid_maps = static:12
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
# debugging
debug_peer_level = 2
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
xxgdb $daemon_directory/$process_name $process_id & sleep 5
# authentication
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
# tls config
smtp_use_tls = yes
smtpd_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
smtp_tls_session_cache_database = btree:$data_directory/smtp_tls_session_cache
# Change mail.example.com.* to your host name
smtpd_tls_key_file = /etc/pki/tls/private/myhostname.example.com.key
smtpd_tls_cert_file = /etc/pki/tls/certs/myhostname.example.com.crt
# smtpd_tls_CAfile = /etc/pki/tls/root.crt
# rules restrictions
smtpd_client_restrictions =
smtpd_helo_restrictions =
smtpd_sender_restrictions =
smtpd_recipient_restrictions = permit_sasl_authenticated,
permit_mynetworks,
reject_unauth_destination,
# reject_non_fqdn_sender,
# reject_non_fqdn_recipient,
# reject_unknown_recipient_domain
# uncomment for realtime black list checks. (Warn: will also reject false positive)
# ,reject_rbl_client zen.spamhaus.org
# ,reject_rbl_client bl.spamcop.net
# ,reject_rbl_client dnsbl.sorbs.net
smtpd_helo_required = yes
unknown_local_recipient_reject_code = 550
disable_vrfy_command = yes
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_banner = $myhostname ESMTP
message_size_limit = 20480000
其中 myhostname.example.com 是我真实的 smtp 域。
我不知道是否因为这个错误，但我无法向@outlook或@hotmail帐户发送电子邮件
答案1
您的域名（从 SMTP 记录来看似乎example.com在 中proxy:mysql:/etc/sentora/configs/postfix/mysql-relay_domains_maps.cf）mydestination是否只包括 localhost.hostname.domain.com 和 localhost，这可能导致邮件被接受。
编辑：我并不是想告诉你将域添加到 mydestination 列表中。由于一半的配置都是通过 mysql 完成的，所以很难说。你可以检查这些表。我建议特别检查virtual_mailbox_domains和relay_domains。
你可以debug_peer_list配置变量来检查发生了什么。也许这会给你指明正确的方向。
但我强烈建议不要在不知道自己在做什么的情况下乱搞邮件服务器。打开开放中继并惹上 ISP 麻烦是件非常容易的事。
顺便说一句，你从整个问题中删除了你的域名，但将其留在了 SMTP 记录的第一行；）
bw2. 在进一步搞乱它之前