Exim 路由到 Cyrus LMTP 失敗

我在讓 Exim 與 Cyrus lmtp 交談時遇到問題。

我知道 lmtp 正在接收。它正在偵聽埠 2003。我使用以下 perl 腳本對其進行了測試。

!/usr/bin/perl -w

use Net::LMTP;

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

$lmtp->mail($ENV{USER});
$lmtp->to('test@example.com');

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

$lmtp->quit;

執行它會產生一個文件， 1. 出現在相應的 cyrus spool 文件夾中：

root@myhost:/var/spool/cyrus/mail/domain/e/example.com/t/user/test# cat 1.
Return-Path: <root@myhost.example.net>
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: <cmu-lmtpd-11754-1538912748-0@myhost.example.net>
Date: Sun, 07 Oct 2018 12:45:48 +0100

A simple test message

我正在執行我自己的 exim 自定義版本。

執行 exim 的 -bt 測試路由選項

/usr/exim/bin/exim -bt test@example.com

結果是

test@example.com
 router = cyrus_vdom, transport = cyrus_ltcp

這是exim路由器和傳輸：

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


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

消息卡在 exim 中，正在執行

exim -qff 

不會將它們移出。

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

歡迎任何建議。

Ping localhost 導致

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

IPv6，很明顯。

跑步

netstat -anp

表明在 IPv6 上沒有監聽埠 2003，只有 IP4。

將 exim 傳輸主機更改為此修復它。

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

引用自：https://serverfault.com/questions/934355