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Postfix 别名邮件仅接收来自本地邮箱的邮件

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Postfix 别名邮件仅接收来自本地邮箱的邮件

我按照指南安装了 Postfix-Dovecot 邮件服务器（如何使用 Postfix、Dovecot 和 MySQL 设置电子邮件服务器) 定义了一个包含虚拟邮箱和映射虚拟域、虚拟用户和虚拟别名的数据库的简单设置。

下面，服务器域名为server.com。邮件服务器还处理另一个域名，此处称为example.com。

[email protected]有一个别名，[email protected]。以下是发生的事情：

  1. 邮件发件人[email protected]：[email protected]已发送
  2. 邮件发件人[email protected]：[email protected]已发送
  3. 邮寄[email protected]至[email protected]：拒绝

最后一种情况的答复是：

554 5.7.1 <[email protected]>: Recipient address rejected: Unknown user

换句话说，该别名仅从本地邮箱接收消息。

收件人限制如下：

smtpd_recipient_restrictions =
        permit_mynetworks,
        permit_sasl_authenticated,
        reject_non_fqdn_recipient,
        reject_unknown_recipient_domain,
        reject_unlisted_recipient,
        reject_unauth_destination,
        check_policy_service inet:localhost:12345

答案1

到目前为止，这个问题似乎只被报告过一次这里，在 Dovecot 配额检查中确定了原因。

在这种情况下，这是最后一个smtpd_recipient_restrictions：

check_policy_service inet:localhost:12345

事实上，删除它之后问题就消失了。

当配额检查到位时，日志显示以下内容：

dovecot: quota-status([email protected]): auth-master: userdb lookup([email protected]): Started userdb lookup
dovecot: auth: master in: USER#0111#[email protected]#011service=quota-status
dovecot: auth: static([email protected]): Performing userdb lookup
dovecot: auth: sql([email protected]): Performing passdb lookup
dovecot: auth-worker: conn unix:auth-worker: Handling PASSL request
dovecot: auth-worker: sql([email protected]): Performing passdb lookup
dovecot: auth-worker: sql([email protected]): query: SELECT email as user, password FROM virtual_users WHERE email='[email protected]';
dovecot: auth-worker: sql([email protected]): unknown user
dovecot: auth-worker: sql([email protected]): Finished passdb lookup
dovecot: auth-worker: conn unix:auth-worker: Finished
dovecot: auth: sql([email protected]): Finished passdb lookup
dovecot: auth: static([email protected]): Finished userdb lookup
dovecot: auth: userdb out: NOTFOUND#0111
dovecot: quota-status([email protected]): auth-master: userdb lookup([email protected]): auth USER input: 
dovecot: quota-status([email protected]): auth-master: userdb lookup([email protected]): Userdb lookup failed
postfix/smtpd: NOQUEUE: reject: 554 5.7.1 <[email protected]>: Recipient address rejected: Unknown user; from=<mymailgmail.com> to=<[email protected]>

问题是，定义的查询etc/dovecot/dovecot-sql.conf.ext仅在表中搜索电子邮件virtual_users：

query: SELECT email as user, password FROM virtual_users WHERE email='[email protected]';

这Linode 教程上面引用的某个时候指出：

要使用别名作为用户名：

将别名作为源和目标电子邮件地址添加到 virtual_aliases 表中。将/etc/dovecot/dovecot-sql.conf.ext文件的 password_query 值更改为：

   password_query = SELECT email as user, password FROM virtual_users WHERE email=(SELECT destination FROM virtual_aliases WHERE source = '%u');

我选择了一个稍微不同的解决方案，对两个查询进行并集，以便首先搜索虚拟用户，然后搜索虚拟别名：

password_query = SELECT email as user, password FROM virtual_users WHERE email='%u' \
 UNION SELECT email as user, password FROM virtual_users WHERE email=(SELECT destination FROM virtual_aliases WHERE source = '%u');

这很好用。以下是日志的摘录：

dovecot: quota-status([email protected]): auth-master: userdb lookup([email protected]): Started userdb lookup
dovecot: auth: master in: USER#0114#[email protected]#011service=quota-status
dovecot: auth: static([email protected]): Performing userdb lookup
dovecot: auth: sql([email protected]): Performing passdb lookup
dovecot: auth: sql([email protected]): username changed [email protected] -> [email protected]
dovecot: auth: sql([email protected]): Finished passdb lookup
dovecot: auth: static([email protected]): Finished userdb lookup
dovecot: auth: userdb out: USER#0114#[email protected]#011uid=5000#011gid=5000#011home=/var/mail/vhosts/example.com/mail
dovecot: auth-worker: conn unix:auth-worker: Handling PASSL request
dovecot: auth-worker: sql([email protected]): Performing passdb lookup
dovecot: auth-worker: sql([email protected]): query: SELECT email as user, password FROM virtual_users WHERE email='[email protected]' UNION SELECT email as user, password FROM virtual_users WHERE email=(SELECT destination FROM virtual_aliases WHERE source='[email protected]');
dovecot: auth-worker: sql([email protected]): username changed [email protected] -> [email protected]
dovecot: auth-worker: sql([email protected]): Finished passdb lookup
dovecot: auth-worker: conn unix:auth-worker: Finished
dovecot: quota-status([email protected]): auth-master: userdb lookup([email protected]): auth USER input: [email protected] uid=5000 gid=5000 home=/var/mail/vhosts/example.com/mail
dovecot: quota-status([email protected]): auth-master: userdb lookup([email protected]): Finished userdb lookup
dovecot: quota-status([email protected]): changed username to [email protected]
dovecot: quota-status([email protected]): Effective uid=5000, gid=5000, home=/var/mail/vhosts/example.com/mail
dovecot: lmtp([email protected]): auth-master: userdb lookup([email protected]): Started userdb lookup
dovecot: lmtp([email protected]): auth-master: userdb lookup([email protected]): auth USER input: [email protected] uid=5000 gid=5000 home=/var/mail/vhosts/example.com/mail
dovecot: lmtp([email protected]): auth-master: userdb lookup([email protected]): Finished userdb lookup
dovecot: auth: master in: USER#0112#[email protected]#011service=lmtp
dovecot: auth: static([email protected]): Performing userdb lookup
dovecot: auth: sql([email protected]): Performing passdb lookup
dovecot: auth: sql([email protected]): Finished passdb lookup
dovecot: auth: static([email protected]): Finished userdb lookup
dovecot: auth: userdb out: USER#0112#[email protected]#011uid=5000#011gid=5000#011home=/var/mail/vhosts/example.com/mail
dovecot: auth-worker: conn unix:auth-worker: Handling PASSL request
dovecot: auth-worker: sql([email protected]): Performing passdb lookup
dovecot: auth-worker: sql([email protected]): query: SELECT email as user, password FROM virtual_users WHERE email='[email protected]' UNION SELECT email as user, password FROM virtual_users WHERE email=(SELECT destination FROM virtual_aliases WHERE source='[email protected]');
dovecot: auth-worker: sql([email protected]): Finished passdb lookup
dovecot: auth-worker: conn unix:auth-worker: Finished
dovecot: lmtp([email protected]): lmtp-server: conn unix: rcpt [email protected]: Effective uid=5000, gid=5000, home=/var/mail/vhosts/example.com/mail
dovecot: lmtp([email protected]): lmtp-server: conn unix: rcpt [email protected]: Mailbox INBOX: Mailbox opened because: lib-lda delivery
dovecot: lmtp([email protected]): saved mail to INBOX
postfix/lmtp: to=<[email protected]>, orig_to=<[email protected]>, relay=server.example.com[private/dovecot-lmtp], status=sent

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