我正在尝试设置 Postfix、Dovecot、Spamassassin 电子邮件堆栈并安装和配置所有内容。
但是，每次我尝试使用客户端连接到服务器时，它都无法连接到发送服务器（配置接收服务器没有问题）。我尝试使用 Thunderbird（在我的 PC 上）和 Bluemail（在我的手机上）。
mail.log当我尝试连接到传出服务器时显示两行：
Aug 11 12:39:07 pyrosoftsolutions postfix/smtpd[13039]: lost connection after EHLO from 60.216.208.46.dyn.plus.net[46.208.216.60]
Aug 11 12:39:07 pyrosoftsolutions postfix/smtpd[13039]: disconnect from 60.216.208.46.dyn.plus.net[46.208.216.60] ehlo=1 commands=1
我尝试过使用和不使用身份验证来连接端口 587。
我的 netstat 显示 postfix 确实正在监听正确的端口：
root@pyrosoftsolutions:/home/james# netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1489/sshd
tcp 0 0 0.0.0.0:3128 0.0.0.0:* LISTEN 1090/(squid-1)
tcp 0 0 0.0.0.0:39001 0.0.0.0:* LISTEN 2190/flarecoind
tcp 0 0 127.0.0.1:39002 0.0.0.0:* LISTEN 2190/flarecoind
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 1876/nginx: master
tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 1545/dovecot
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1505/mysqld
tcp 0 0 0.0.0.0:587 0.0.0.0:* LISTEN 1862/master
tcp 0 0 0.0.0.0:5355 0.0.0.0:* LISTEN 1350/systemd-resolv
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1876/nginx: master
tcp6 0 0 :::22 :::* LISTEN 1489/sshd
tcp6 0 0 :::3000 :::* LISTEN 2192/gitea
tcp6 0 0 :::443 :::* LISTEN 1876/nginx: master
tcp6 0 0 :::993 :::* LISTEN 1545/dovecot
tcp6 0 0 :::587 :::* LISTEN 1862/master
tcp6 0 0 :::5355 :::* LISTEN 1350/systemd-resolv
tcp6 0 0 :::80 :::* LISTEN 1876/nginx: master
这是我的master.cf文件：
smtp inet n - n - - smtpd
submission inet n - y - - smtpd
-o syslog_name=postfix/submission
-o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
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
smtp unix - - y - - smtp
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 - - smtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
maildrop unix - n n - - pipe
flags=DRhu 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=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
和我的ufw status verbose：
root@pyrosoftsolutions:/home/james# ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip
To Action From
-- ------ ----
80 ALLOW IN Anywhere
443 ALLOW IN Anywhere
22 ALLOW IN Anywhere
39001 ALLOW IN Anywhere
39002 ALLOW IN Anywhere
3128 ALLOW IN Anywhere
22/tcp ALLOW IN Anywhere
25/tcp (Postfix) ALLOW IN Anywhere
3000 ALLOW IN Anywhere
587 ALLOW IN Anywhere
25 ALLOW IN Anywhere
2048,3128,3130,3401,4827/tcp (Squid) ALLOW IN Anywhere
993 ALLOW IN Anywhere
995 ALLOW IN Anywhere
465 ALLOW IN Anywhere
80 (v6) ALLOW IN Anywhere (v6)
443 (v6) ALLOW IN Anywhere (v6)
22 (v6) ALLOW IN Anywhere (v6)
39001 (v6) ALLOW IN Anywhere (v6)
39002 (v6) ALLOW IN Anywhere (v6)
3128 (v6) ALLOW IN Anywhere (v6)
22/tcp (v6) ALLOW IN Anywhere (v6)
25/tcp (Postfix (v6)) ALLOW IN Anywhere (v6)
3000 (v6) ALLOW IN Anywhere (v6)
587 (v6) ALLOW IN Anywhere (v6)
25 (v6) ALLOW IN Anywhere (v6)
2048,3128,3130,3401,4827/tcp (Squid (v6)) ALLOW IN Anywhere (v6)
993 (v6) ALLOW IN Anywhere (v6)
995 (v6) ALLOW IN Anywhere (v6)
465 (v6) ALLOW IN Anywhere (v6)
然而，奇怪的是，我可以telnet在内部和外部移植 587，没有任何问题。
有什么建议吗？