Pop3 not expunge - expire plugin info

[Domenico Pastore]

Hi,

I have upgraded dovecot from version 2.2.15 to 2.3.7.
I have an issue with protocol pop3 when the client delete more messages 
but did not execute "quit" command.

With version 2.3.7 without quit command, the server pop not remove mail 
marked deleted.

With version 2.2.15 even without quit command, the server pop remove 
mail marked deleted.

Has this behavior been fixed in the new version?

Has the expire plugin anything to do with that?

BR,
Domenico


--------------------

# 2.3.7.2 (3c910f64b): /config/dovecot/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 (7372921a)
# OS: Linux 3.10.0-1062.1.2.el7.x86_64 x86_64 CentOS Linux release 
7.7.1908 (Core)

auth_debug = yes
auth_master_user_separator = *
auth_username_format =
base_dir = /data/dovecot/var/run/dovecot
default_client_limit = 8192
default_vsz_limit = 768 M
dict {
   sqlquota = mysql:/config/dovecot/common/dovecot-dict-sql.conf.ext
}
disable_plaintext_auth = no
doveadm_password = # hidden, use -P to show it
first_valid_gid = 101
first_valid_uid = 102
imap_id_send =
import_environment = TZ
info_log_path = /LOGS/dovecot/dovecot.log
instance_name = dovecot
listen = dovecot
log_path = /LOGS/dovecot/dovecot.log
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_gid = 101
mail_location = maildir:%h/Maildir
mail_max_userip_connections = 50
mail_plugins = quota fts fts_solr mail_log notify virtual
mail_uid = 102
maildir_broken_filename_sizes = yes
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope 
encoded-character vacation subaddress comparator-i;ascii-numeric 
relational regex imap4flags copy include variables body enotify 
environment mailbox date index ihave duplicate mime foreverypart 
extracttext vnd.dovecot.debug
mbox_write_locks = fcntl
namespace {
   hidden = yes
   list = no
   location = 
virtual:/config/dovecot/common/virtual:INDEX=~/virtual:SUBSCRIPTIONS=.subscriptions/%u
   prefix = Messaggi in arrivo.
   separator = .
   subscriptions = no
}
namespace inbox {
   inbox = yes
   location =
   mailbox Drafts {
     special_use = \Drafts
   }
   mailbox Junk {
     special_use = \Junk
   }
   mailbox Sent {
     special_use = \Sent
   }
   mailbox "Sent Messages" {
     special_use = \Sent
   }
   mailbox Trash {
     special_use = \Trash
   }
   prefix = INBOX.
   separator = .
   subscriptions = yes
   type = private
}
passdb {
   args = /config/dovecot/common/passwd.masterusers
   driver = passwd-file
   master = yes
}
passdb {
   args = /config/dovecot/dovecot/dovecot-ldap.conf
   driver = ldap
}
passdb {
   args = /config/dovecot/common/dovecot-ldap-multiuser.conf
   driver = ldap
   master = yes
}
passdb {
   args = /config/dovecot/common/dovecot-ldap-webmail.conf.ext
   driver = ldap
   master = yes
}
plugin {
   fts = solr
   fts_autoindex = yes
   fts_autoindex_max_recent = 1000
   fts_solr = url=https://192.160.10.81:8983/solr/dovecot/
   mail_log_events = delete undelete expunge copy mailbox_delete 
mailbox_rename flag_change save mailbox_create
   mail_log_fields = uid box msgid size flags
   quota = dict:User quota::proxy::sqlquota
   quota_rule2 = INBOX.Trash:storage=+100M
   sieve_default = /dovecot/common/default.sieve
   sieve_extensions = +vnd.dovecot.debug
}
postmaster_address = posta at XXXX.it
service anvil {
   client_limit = 8000
}
service auth {
   client_limit = 12000
   unix_listener auth-userdb {
     mode = 0600
   }
}
service dict {
   process_limit = 7500
   process_min_avail = 10
   unix_listener dict {
     mode = 0600
     user = dovecot
   }
}
service doveadm {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = doveadm-server
   extra_groups =
   group =
   idle_kill = 0
   inet_listener {
     port = 924
   }
   privileged_group =
   process_limit = 0
   process_min_avail = 10
   protocol =
   service_count = 100
   type =
   unix_listener doveadm-server {
     group =
     mode = 0600
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 993
     ssl = yes
   }
   process_limit = 5000
   process_min_avail = 10
}
service imap {
   drop_priv_before_exec = yes
   process_limit = 5000
   process_min_avail = 10
}
service lmtp {
   inet_listener lmtp {
     port = 24
   }
   process_limit = 2500
   process_min_avail = 10
}
service managesieve-login {
   inet_listener sieve {
     port = 4190
   }
   process_min_avail = 0
   service_count = 1
   vsz_limit = 64 M
}
service managesieve {
   drop_priv_before_exec = yes
   process_limit = 1024
}
service pop3-login {
   inet_listener pop3 {
     port = 110
   }
   inet_listener pop3s {
     port = 995
     ssl = yes
   }
   process_limit = 1000
   process_min_avail = 5
}
service pop3 {
   drop_priv_before_exec = yes
   process_limit = 1000
   process_min_avail = 5
}
ssl_cert = </config/dovecot/common/certs/dovecot.pem
ssl_client_ca_file = /config/solr-certs/solr-ssl.pem
ssl_key = # hidden, use -P to show it
userdb {
   args = /config/dovecot/dovecot/dovecot-ldap.conf
   driver = ldap
}
protocol lmtp {
   mail_plugins = quota mail_log notify sieve virtual fts fts_solr
}
protocol lda {
   mail_plugins = quota mail_log notify sieve virtual
}
protocol imap {
   mail_plugins = quota imap_quota mail_log notify virtual fts fts_solr
}
protocol pop3 {
   mail_plugins = quota mail_log notify virtual
   pop3_uidl_format = UID%u-%v
}