我一直无法使用 Postfix 电子邮件服务器接收电子邮件。我一开始打开的是端口 587，但每当我向该端口发送电子邮件时，似乎什么都没发生，并且 /var/log/mail.log 会显示拒绝访问端口 25（我没有打开端口 25，因为我认为只需要 587）。
然后我尝试为其打开端口 25，但现在出现错误 5.7.1 中继访问被拒绝。
我不确定发生了什么，似乎无法修复它。不过我似乎可以正常发送邮件。
以下是输出postconf -n
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
compatibility_level = 2
header_checks = regexp:/etc/postfix/header_checks
home_mailbox = Mail/Inbox/
inet_interfaces = all
inet_protocols = all
mailbox_command = /usr/lib/dovecot/deliver
mailbox_size_limit = 0
milter_default_action = accept
milter_protocol = 6
mydestination = localhost.$mydomain, localhost, $mydomain
myhostname = website.com
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
non_smtpd_milters = inet:localhost:12301
readme_directory = no
recipient_delimiter = +
relayhost =
smtp_tls_CAfile = /etc/letsencrypt/live/mail.website.com/cert.pem
smtp_tls_CApath = /etc/ssl/certs
smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, reject_unknown_helo_hostname
smtpd_milters = inet:localhost:12301
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unknown_recipient_domain
smtpd_relay_restrictions = permit_sasl_authenticated, reject_unauth_destination, permit_mynetworks
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous, noplaintext
smtpd_sasl_tls_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = pcre:/etc/postfix/login_maps.pcre
smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_sender_login_mismatch, reject_unknown_reverse_client_hostname, reject_unknown_sender_domain
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/letsencrypt/live/mail.website.com/fullchain.pem
smtpd_tls_exclude_ciphers = aNULL, LOW, EXP, MEDIUM, ADH, AECDH, MD5, DSS, ECDSA, CAMELLIA128, 3DES, CAMELLIA256, RSA+AES, eNULL
smtpd_tls_key_file = /etc/letsencrypt/live/mail.website.com/privkey.pem
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_security_level = may
tls_preempt_cipherlist = yes
这是postconf -M
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
relay unix - - y - - smtp
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
maildrop unix - n n - - pipe flags=DRXhu user=vmail argv=/usr/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=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=FRX user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
spamassassin unix - n n - - pipe user=debian-spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
smtp unix - - n - - smtp
smtp inet n - y - - smtpd -o content_filter=spamassassin
submission inet n - y - - smtpd -o syslog_name=postfix/submission -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_tls_auth_only=yes
smtps inet n - y - - smtpd -o syslog_name=postfix/smtps -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
spamassassin unix - n n - - pipe user=debian-spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
（域名由真实域名更改为 website.com）
答案1
mydestination = localhost.$mydomain，localhost，$mydomain
您接受发往localhost、localhost.$mydomain和的邮件$mydomain。
您无需定义$mydomain任何地方。添加一行，mydomain = example.com其中example.com指定您希望接收邮件的域。
话虽如此，电子邮件是一种吃力不讨好的服务。只要犯一个错误，你就会受到所有主要参与者的黑名单。如果你不了解协议的工作原理，最好远离它。