The plugins/blockmessage/config.yml file is generated on the first startup.

# =================================================================
# BlockMessage Plugin Configuration (Default Profile Template)
# This file will be copied to profiles/default.yml if it doesn't exist.
# =================================================================

# Enable or disable the entire plugin for this profile.
# If false, no players will be blocked and the MOTD will not be changed when this profile is active.
enabled: true

# The message displayed to players when they are blocked from joining.
# This is a list of strings, where each string represents a new line.
# You can use '&' for color codes.
block-message:
  - "&cThis server is currently in maintenance mode."
  - "&ePlease try again later."

# Configuration for the custom MOTD (Message of the Day) shown in the server list.
block-motd:
  # Enable or disable the custom MOTD when the plugin is enabled in this profile.
  enabled: true

  # The first line of the MOTD.
  line1: "&cServer is in Maintenance"

  # The second line of the MOTD.
  line2: "&eWe will be back soon!"

  # The maximum player count to display. Set to -1 to use the server's default from bungee config.
  max-players: 0 # Set to 0 to override Bungee default and show 'Maintenance' count

  # The online player count to display. Set to -1 to use the server's default from bungee config.
  online-players: 0 # Set to 0 to override Bungee default and show 'Maintenance' count

# Players in this list will not be blocked, even if the plugin is enabled in this profile.
# This is useful for allowing admins to join during maintenance.
# Names are case-insensitive during checks, but stored as entered.
whitelist:
  - "AdminPlayer1"
  - "AnotherAdmin"

&0	Black
&1	Dark Blue
&2	Dark Green
&3	Dark Aqua
&4	Dark Red
&5	Purple
&6	Gold
&7	Gray
&8	Dark Gray
&9	Blue
&a	Green
&b	Aqua
&c	Red
&d	Pink
&e	Yellow
&f	White

&k	Obfuscated (scrambled text)
&l	Bold
&m	Strikethrough
&n	Underline
&o	Italic
&r	Reset Formatting