exim 和 dovecot 使用者超過配額：發送時拒絕？

我有一個 exim + dovecot 郵件伺服器設置，每個使用者配額（通過 mysql 查找）正在執行。當目標本地郵箱超過配額時，伺服器會拒絕來自非本地發件人的傳入郵件。本地使用者可以不受限制地發送郵件，即使他的郵箱超過配額。

我希望在本地使用者嘗試發送電子郵件並返回諸如“您的帳戶已超過配額，請先刪除一些郵件”之類的錯誤時檢查配額。無論配額如何，都應該接受來自非本地發件人到本地郵箱的傳入郵件。

“設置 exim”中描述了類似的配置：

acl_check_rcpt:
#...
 # Deny sending for local users if almost at quota
       # only run for local domains
 deny  sender_domains = +local_domains
       # list all addresses that are aliases
       # though people shouldn't be sending as
       # them, many scripts do
       !senders = ^postmaster@.*:\
                  ^root@.*:\
                  ^webmaster@.*:\
                  ^error-.*@.*:\
                  ^bounce-.*@.*
       # might need to exclude webmail server here
       # if it does not report the error message
       # note: squirrelmail tested ok for me
       hosts = +local_hosts
       # verify your email client expunges on emptying the trash
       message = You have too much email stored. Please delete some\n\
                 and empty the trash. Then you can send.
       log_message = $sender_address_local_part is over send quota
       condition = ${run{sudo -u root /etc/exim/check-sendquota.sh $sender_address_local_part}{no}{yes}}

它使用自定義腳本來檢查郵箱大小 - 出於性能原因，我寧願使用已經存在的配額文件/系統，但我無法找出正確的“條件”行。我無法從目前配置中看到 exim 實際檢查郵箱大小的位置。目前配置包含以下內容：

exim4.conf：

local_delivery:
   driver = appendfile
   maildir_format
   user = mailserv
   group = mailserv
   mode = 0660
   mode_fail_narrower = false
   envelope_to_add = true
   return_path_add = true
   maildir_tag = ,S=$message_size
   quota_size_regex = ,S=(\d+)
   quota =  ${lookup mysql{SELECT CONCAT(quota, "M") FROM users WHERE account='${local_part}@${domain}'}{$value}{7M}}
   directory = ${lookup mysql{SELECT maildir FROM users WHERE account='${local_part}@${domain}'}}

dovecot.conf：

protocol imap {
   mail_plugins = quota imap_quota
}
plugin {
   quota = maildir:user
   quota_rule = *:storage=5GB
}

您需要在您的 acl_not_smtp acl 中添加類似的配額檢查，此 acl 用於本地使用者/程序送出的所有無 smtp 郵件

http://www.exim.org/exim-html-current/doc/html/spec_html/ch40.html

引用自：https://serverfault.com/questions/363016