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Exim 路由至 Cyrus LMTP 失败

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Exim 路由至 Cyrus LMTP 失败

我在让 Exim 与 Cyrus lmtp 对话时遇到了问题。

我知道 lmtp 正在接收。它正在监听端口 2003。我使用以下 perl 脚本对其进行了测试。

!/usr/bin/perl -w

use Net::LMTP;

my $lmtp = Net::LMTP->new('localhost', 2003);

$lmtp->mail($ENV{USER});
$lmtp->to('[email protected]');

$lmtp->data();
$lmtp->datasend("To: postmaster\n");
$lmtp->datasend("\n");
$lmtp->datasend("A simple test message\n");
$lmtp->dataend();

$lmtp->quit;

执行它会生成一个文件，1.出现在相应的 cyrus spool 文件夹中：

root@myhost:/var/spool/cyrus/mail/domain/e/example.com/t/user/test# cat 1.
Return-Path: <[email protected]>
Received: from myhost.example.net (localhost [127.0.0.1])
         by myhost.example.net (Cyrus 2.5.10-Debian-2.5.10-3) with LMTPA;
         Sun, 07 Oct 2018 12:45:48 +0100
X-Sieve: CMU Sieve 2.4
To: postmaster
Message-ID: <[email protected]>
Date: Sun, 07 Oct 2018 12:45:48 +0100

A simple test message

我正在运行我自己定制的 exim 版本。

执行 exim 的 -bt 测试路由选项

/usr/exim/bin/exim -bt [email protected]

结果是

[email protected]
  router = cyrus_vdom, transport = cyrus_ltcp

以下是 Exim 路由器和传输：

cyrus_vdom:
  driver = accept
  domains = +cyrus_domains
  transport = cyrus_ltcp
  no_more


cyrus_ltcp:
  driver = smtp
  protocol = lmtp
  hosts = localhost
  port = 2003

消息滞留在 exim 中，并且正在执行

exim -qff

不会将它们移出。

2018-10-07 12:35:48 exim 4.91 daemon started: pid=11455, -q30m, listening for SMTP on port 25 (IPv6 and IPv4) port 587 (IPv6 and IPv4) and for SMTPS on port 465 (IPv6 and IPv4)
2018-10-07 12:35:48 Start queue run: pid=11456
2018-10-07 12:35:48 1g8uZF-00027o-TS Message is frozen
2018-10-07 12:35:48 1g8oBv-0000L0-JO Message is frozen
2018-10-07 12:35:48 End queue run: pid=11456
2018-10-07 13:05:48 Start queue run: pid=11812
2018-10-07 13:05:48 1g8uZF-00027o-TS Message is frozen
2018-10-07 13:05:48 1g8oBv-0000L0-JO Message is frozen
2018-10-07 13:05:48 End queue run: pid=11812
2018-10-07 13:35:49 Start queue run: pid=11955
2018-10-07 13:35:49 1g8oBv-0000L0-JO Message is frozen
2018-10-07 13:35:49 1g8uZF-00027o-TS Message is frozen
2018-10-07 13:35:49 End queue run: pid=11955

欢迎任何建议。

答案1

Ping localhost 导致

PING localhost(localhost (::1)) 56 data bytes
64 bytes from localhost (::1): icmp_seq=1 ttl=64 time=0.039 ms
64 bytes from localhost (::1): icmp_seq=2 ttl=64 time=0.046 ms
64 bytes from localhost (::1): icmp_seq=3 ttl=64 time=0.047 ms

显然是 IPv6。

跑步

netstat -anp

显示端口 2003 没有在 IPv6 上被监听，只有 IP4 被监听。

将 exim 传输主机更改为此即可修复该问题。

cyrus_ltcp:
  driver = smtp
  protocol = lmtp
  hosts = 127.0.0.1
  port = 2003
  allow_localhost

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