Linux
MX 記錄的 exim4 問題
我有一台執行 Exim4 的 Debian 機器。
但是,在檢查 Exim 日誌時,我在郵寄自己的域時注意到了這個問題:
2010-12-14 09:20:01 1PSQ77-0005mG-9w ** root@domain.com: all relevant MX records point to non-existent hosts 2010-12-14 09:20:01 1PSQ77-0005mJ-CH ** root@domain.com: all relevant MX records point to non-existent hosts
在 dig 中檢查 MX 時:
# dig mx domain.com ... ;; QUESTION SECTION: ;domain.com. IN MX ;; ANSWER SECTION: domain.com. 3600 IN MX 50 mailprotect.tyneso.com. domain.com. 3600 IN MX 10 mailprotect2.tyneso.com. ;; ADDITIONAL SECTION: mailprotect.tyneso.com. 2082 IN A 192.168.13.10 mailprotect2.tyneso.com. 2382 IN A 192.168.13.12 ;; Query time: 1 msec ;; SERVER: 192.168.22.11#53(192.168.22.11) ;; WHEN: Tue Dec 14 09:21:22 2010 ;; MSG SIZE rcvd: 126
然而我能夠ping和telnet梭子魚伺服器:
# ping mailprotect2.tyneso.com. PING mailprotect2.tyneso.com (192.168.13.12) 56(84) bytes of data. 64 bytes from 192.168.13.12: icmp_seq=1 ttl=64 time=5.17 ms 64 bytes from 192.168.13.12: icmp_seq=2 ttl=64 time=0.647 ms --- mailprotect2.tyneso.com ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 5066ms rtt min/avg/max/mdev = 0.647/2.910/5.174/2.264 ms # telnet mailprotect2.tyneso.com 25 Trying 192.168.13.12... Connected to mailprotect2.tyneso.com. Escape character is '^]'. 220 *************************************************************** ^]
任何線索可能導致 Exim 吐出這些錯誤?
謝謝
問題是 MX 記錄在 RFC1918 私有範圍內。預設情況下,exim 拒絕連接到私有 IPS。在您的配置中查看如下行:
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 : 192.168.0.0/16 : 172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16
並修改它以滿足您的需求。