How to declare port 143

Hi all,

I have Dovecot 2.4.2 working (plain text only) on my Qemu virtual
machine, with Claws-Mail able to work with all its files. However, I
want to declare the Dovecot server as running on Port 143, and when I
do, I dovecot -F throws the error message shown later in this message.
If I comment out the explicit port declaration, it works fine, and I
want to know why. To the best of my knowledge, my declaration of port
143 exactly matches your 2.4.2 documentation:

The following is my attempt to tell Dovecot to serve *explicitly* at
port 143:

===============================================
# My Dovecot server will operate on Localhost
listen = 127.0.0.1

service imap {
  inet_listener imap-login {
    port = 143
  }
#  inet_listener imaps {
#    port = 993
#    ssl = yes
#  }
}
===============================================

The following is the result:

===============================================
[root@dovecotvoid ~]# dovecot -F
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf:
duplicate listener: 143:127.0.0.1 [root@dovecotvoid ~]#
===============================================

If I comment out the port = 143, it works. Why is it griping about a
duplicate listener? At the bottom of this email is the entire
dovecot.conf and the result of dovecot -n, and there are no
sub-configuration files in conf.d :


===============================================
# Start new configs with the latest Dovecot version numbers here:
dovecot_config_version = 2.4.2 # Must be current version
dovecot_storage_version = 2.4.2 # Must be current version or earlier
                                # 2.3 is minimum

# I only want imap
protocols {
  imap = yes
  lmtp = no
  pop3 = no
}

# My Dovecot server will operate on Localhost
listen = 127.0.0.1

service imap {
  inet_listener imap-login {
    port = 143
  }
#  inet_listener imaps {
#    port = 993
#    ssl = yes
#  }
}

# mail_home is only for virtual users
# A virtual user is a user with no system account
# I have no virtual users, so I've commented out mail_home.
#mail_home = /srv/mail/%{user}

# mail_driver is the storage format
mail_driver = maildir

# mail_path is location of top of storage data
# WARNING: For troubleshooting be prepared to switch
# to literal location of ~
mail_path = ~/mail/Maildir  # In my case

# mail_home is the home directory of the user identified as ~
# WARNING: system users have no ~ without it.
mail_home = /home/slitt

# You need a log you can locate
# There might not be a 
log_path=/var/log/dovecot.log


#mail_uid = slitt
#mail_gid = slitt
mail_uid = vmail
mail_gid = vmail

# By default first_valid_uid is 500. 
#If your vmail user's UID is smaller,
# you need to modify this:
#first_valid_uid = uid-number-of-vmail-user

namespace inbox {
  inbox = yes
  separator = /
}

# Authenticate as system users:
passdb pam {
   driver = pam
   #driver = passwd
}

userdb passwd {
  driver = passwd
}

#ssl_server_cert_file = /etc/dovecot/ssl-cert.pem
#ssl_server_key_file = /etc/dovecot/ssl-key.pem
===============================================




The following is the output of dovecot -n:

===============================================
# 2.4.2 (0962ed2104): /etc/dovecot/dovecot.conf
# OS: Linux 6.12.71_1 x86_64  
# Hostname: dovecotvoid
dovecot_config_version = 2.4.2
dovecot_storage_version = 2.4.2
listen = 127.0.0.1
log_path = /var/log/dovecot.log
mail_driver = maildir
mail_gid = vmail
mail_home = /home/slitt
mail_path = ~/mail/Maildir
mail_uid = vmail
protocols {
  imap = yes
  lmtp = no
  pop3 = no
}
service imap {
  inet_listener imap-login {
    port = 143
  }
}
namespace inbox {
  inbox = yes
  separator = /
}
passdb pam {
  driver = pam
}
userdb passwd {
  driver = passwd
}

===============================================
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