我有一个运行 Ubuntu 的测试虚拟机，其中安装了 postfix、dovecot 和几个用户，使用 Roundcube 设置通过 SMTP 在本地发送邮件。
如果我将用户 A 的 Dovecot 配额设置为 20K，然后从用户 B 向他们发送大约 18K 的邮件，这将使他们的配额达到 90%。我可以看到这一点doveadm quota get -u usera（事实上我看到 Roundcube 在其 UI 中显示了这一点）。
但他们没有收到即将达到配额的通知。我还在通知脚本中加入了一行日志，但没有看到任何日志被写入。
如果我随后从用户 B 发送另一封电子邮件以使用户 A 超出配额，则用户 B 不会收到通知，用户 A 也不会收到通知。但我希望他们会收到。 (编辑：根据@anx 评论，这不一定是正确的期望）
当用户 A 超出配额时回复用户 B，他们会收到 Roundcube 发送的消息，提示无法执行该操作，因为没有可用磁盘空间。但邮件发送成功。
我如何才能让配额正确传达其状态？
我的userdb文件中有以下条目：
usera:::::::userdb_quota_rule=*:bytes=20K
输出自doveconf -n
auth_debug = yes
auth_username_format = %n
mail_debug = yes
mail_location = maildir:~/Maildir
mail_plugins = " quota"
mail_privileged_group = mail
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 =
}
passdb {
driver = pam
}
plugin {
quota = count:User quota
quota_grace = 10%%
quota_max_mail_size = 50M
quota_rule = *:storage=5G
quota_rule2 = Trash:storage=+100M
quota_vsizes = yes
quota_warning = storage=95%% quota-warning 95 %u
quota_warning2 = storage=80%% quota-warning 80 %u
quota_warning4 = -storage=100%% quota-warning -100 %u
}
protocols = " imap"
service quota-status {
client_limit = 1
executable = quota-status -p postfix
inet_listener {
port = 12340
}
}
service quota-warning {
executable = script /usr/local/bin/quota-warning.sh
unix_listener quota-warning {
user = mail
}
user = dovecot
}
ssl_cert = </etc/dovecot/private/dovecot.pem
ssl_client_ca_dir = /etc/ssl/certs
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
driver = passwd
result_internalfail = return-fail
result_success = continue-ok
}
userdb {
args = /etc/dovecot/quotas
driver = passwd-file
result_internalfail = return-fail
result_success = continue
}
protocol !indexer-worker {
mail_vsize_bg_after_count = 100
}
protocol imap {
mail_plugins = " quota imap_quota"
}
后缀postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
compatibility_level = 3.6
default_transport = error
home_mailbox = Maildir/
inet_interfaces = loopback-only
inet_protocols = all
mailbox_size_limit = 0
mydestination = $myhostname, localhost.localdomain, localhost
myhostname = tester.localdomain
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
readme_directory = no
recipient_delimiter = +
relay_transport = error
relayhost =
smtp_tls_CApath = /etc/ssl/certs
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions = check_policy_service inet:127.0.0.1:12340
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_security_level = may
后缀postconf -M
smtp inet n - y - - smtpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp -o syslog_name=postfix/$service_name
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
maildrop unix - n n - - pipe flags=DRXhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe flags=FRX user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
日志
journalctl当 usera 超出配额时发送：
并且当 usera 超出配额时 userb 发送给 usera（此时，userb做收到消息)：