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Filename : :etc:dovecot:conf.d:20-pop3.conf
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##
## POP3 specific settings
##

# Don't try to set mails non-recent or seen with POP3 sessions. This is
# mostly intended to reduce disk I/O. With maildir it doesn't move files
# from new/ to cur/, with mbox it doesn't write Status-header.
#pop3_no_flag_updates = no

# Support LAST command which exists in old POP3 specs, but has been removed
# from new ones. Some clients still wish to use this though. Enabling this
# makes RSET command clear all \Seen flags from messages.
#pop3_enable_last = no

# If mail has X-UIDL header, use it as the mail's UIDL.
#pop3_reuse_xuidl = no

# Allow only one POP3 session to run simultaneously for the same user.
#pop3_lock_session = no

# POP3 requires message sizes to be listed as if they had CR+LF linefeeds.
# Many POP3 servers violate this by returning the sizes with LF linefeeds,
# because it's faster to get. When this setting is enabled, Dovecot still
# tries to do the right thing first, but if that requires opening the
# message, it fallbacks to the easier (but incorrect) size.
#pop3_fast_size_lookups = no

# POP3 UIDL (unique mail identifier) format to use. You can use following
# variables, along with the variable modifiers described in
# doc/wiki/Variables.txt (e.g. %Uf for the filename in uppercase)
#
#  %v - Mailbox's IMAP UIDVALIDITY
#  %u - Mail's IMAP UID
#  %m - MD5 sum of the mailbox headers in hex (mbox only)
#  %f - filename (maildir only)
#  %g - Mail's GUID
#
# If you want UIDL compatibility with other POP3 servers, use:
#  UW's ipop3d         : %08Xv%08Xu
#  Courier             : %f or %v-%u (both might be used simultaneously)
#  Cyrus (<= 2.1.3)    : %u
#  Cyrus (>= 2.1.4)    : %v.%u
#  Dovecot v0.99.x     : %v.%u
#  tpop3d              : %Mf
#
# Note that Outlook 2003 seems to have problems with %v.%u format which was
# Dovecot's default, so if you're building a new server it would be a good
# idea to change this. %08Xu%08Xv should be pretty fail-safe.
#
#pop3_uidl_format = %08Xu%08Xv

# Permanently save UIDLs sent to POP3 clients, so pop3_uidl_format changes
# won't change those UIDLs. Currently this works only with Maildir.
#pop3_save_uidl = no

# What to do about duplicate UIDLs if they exist?
#   allow: Show duplicates to clients.
#   rename: Append a temporary -2, -3, etc. counter after the UIDL.
#pop3_uidl_duplicates = allow

# This option changes POP3 behavior so that it's not possible to actually
# delete mails via POP3, only hide them from future POP3 sessions. The mails
# will still be counted towards user's quota until actually deleted via IMAP.
# Use e.g. "$POP3Deleted" as the value (it will be visible as IMAP keyword).
# Make sure you can legally archive mails before enabling this setting.
#pop3_deleted_flag =

# POP3 logout format string:
#  %i - total number of bytes read from client
#  %o - total number of bytes sent to client
#  %t - number of TOP commands
#  %p - number of bytes sent to client as a result of TOP command
#  %r - number of RETR commands
#  %b - number of bytes sent to client as a result of RETR command
#  %d - number of deleted messages
#  %{deleted_bytes} - number of bytes in deleted messages
#  %m - number of messages (before deletion)
#  %s - mailbox size in bytes (before deletion)
#  %u - old/new UIDL hash. may help finding out if UIDLs changed unexpectedly
#pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s

# Workarounds for various client bugs:
#   outlook-no-nuls:
#     Outlook and Outlook Express hang if mails contain NUL characters.
#     This setting replaces them with 0x80 character.
#   oe-ns-eoh:
#     Outlook Express and Netscape Mail breaks if end of headers-line is
#     missing. This option simply sends it if it's missing.
# The list is space-separated.
#pop3_client_workarounds = 

protocol pop3 {
  # Space separated list of plugins to load (default is global mail_plugins).
  #mail_plugins = $mail_plugins

  # Maximum number of POP3 connections allowed for a user from each IP address.
  # NOTE: The username is compared case-sensitively.
  #mail_max_userip_connections = 10
}