我的服务器拒绝连接。注意：我正尝试从本地主机进行连接。
我正在尝试用来测试的命令：
user@hostname:~$ telnet localhost pop3
Trying ::1...
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused
当我尝试使用 imap 时出现同样的错误。
这鸽舍 维基建议解决问题，但我已经尝试过修复方法。我在配置中添加了协议，并将监听选项设置为*。我的配置如下。我不确定哪里出了问题？## Dovecot 配置文件
# If you're in a hurry, see http://wiki2.dovecot.org/QuickConfiguration
# "doveconf -n" command gives a clean output of the changed settings. Use it
# instead of copy&pasting files when posting to the Dovecot mailing list.
# '#' character and everything after it is treated as comments. Extra spaces
# and tabs are ignored. If you want to use either of these explicitly, put the
# value inside quotes, eg.: key = "# char and trailing whitespace "
# Default values are shown for each setting, it's not required to uncomment
# those. These are exceptions to this though: No sections (e.g. namespace {})
# or plugin settings are added by default, they're listed only as examples.
# Paths are also just examples with the real defaults being based on configure
# options. The paths listed here are for configure --prefix=/usr
# --sysconfdir=/etc --localstatedir=/var
# Enable installed protocols
!include_try /usr/share/dovecot/protocols.d/*.protocol
protocols = pop3 pop3s imap imaps
pop3_uidl_format = %08Xu%08Xv
# A comma separated list of IPs or hosts where to listen in for connections.
# "*" listens in all IPv4 interfaces, "::" listens in all IPv6 interfaces.
# If you want to specify non-default ports or anything more complex,
# edit conf.d/master.conf.
#listen = *, ::
# Base directory where to store runtime data.
#base_dir = /var/run/dovecot/
# Name of this instance. Used to prefix all Dovecot processes in ps output.
#instance_name = dovecot
# Greeting message for clients.
#login_greeting = Dovecot ready.
# Space separated list of trusted network ranges. Connections from these
# IPs are allowed to override their IP addresses and ports (for logging and
# for authentication checks). disable_plaintext_auth is also ignored for
# these networks. Typically you'd specify your IMAP proxy servers here.
#login_trusted_networks =
# Sepace separated list of login access check sockets (e.g. tcpwrap)
#login_access_sockets =
# Show more verbose process titles (in ps). Currently shows user name and
# IP address. Useful for seeing who are actually using the IMAP processes
# (eg. shared mailboxes or if same uid is used for multiple accounts).
#verbose_proctitle = no
# Should all processes be killed when Dovecot master process shuts down.
# Setting this to "no" means that Dovecot can be upgraded without
# forcing existing client connections to close (although that could also be
# a problem if the upgrade is e.g. because of a security fix).
#shutdown_clients = yes
# If non-zero, run mail commands via this many connections to doveadm server,
# instead of running them directly in the same process.
#doveadm_worker_count = 0
# UNIX socket or host:port used for connecting to doveadm server
#doveadm_socket_path = doveadm-server
# Space separated list of environment variables that are preserved on Dovecot
# startup and passed down to all of its child processes. You can also give
# key=value pairs to always set specific settings.
#import_environment = TZ
##
## Dictionary server settings
##
# Dictionary can be used to store key=value lists. This is used by several
# plugins. The dictionary can be accessed either directly or though a
# dictionary server. The following dict block maps dictionary names to URIs
# when the server is used. These can then be referenced using URIs in format
# "proxy::<name>".
答案1
这无法连接...连接被拒绝该消息强烈暗示 Dovecot 没有监听端口 110。使用以下命令检查 Dovecot 是否正在运行：
ps -A | grep dovecot
如果是，请检查它是否正在监听 POP 端口：
sudo lsof -i 4 -a -p $(ps -A | grep dovecot | awk '{ print $1 }')
如果是，请检查是否没有防火墙阻碍。
如果发现 dovecot 没有运行或没有监听 POP 端口，那么你可能错误地配置了 dovecot。检查 dovecot 和系统日志中的错误。检查 dovecot 的配置，如 输出所示dovecot -n。
最有可能的是，您错误配置了protocols指令或指令listen。