I hope this is the correct place to report this, but zabbix.com emails are coming from IP 81.171.84.52, which has no reverse IP DNS entry assigned. Many SMTP servers (including mine, as well as AOL) either reject or mark as spam emails that come from such servers.
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reverse dns
that ip doen't has a PTR, and neither the mail.zabbix.com that is stated at the mx record.
My servers do that too...
for clarification:
joao@por-0140:~$ dig -x 81.171.84.52
; <<>> DiG 9.4.1-P1 <<>> -x 81.171.84.52
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 51857
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;52.84.171.81.in-addr.arpa. IN PTR
;; AUTHORITY SECTION:
84.171.81.in-addr.arpa. 2582 IN SOA ns1.clearcutnetworks.net. hostmaster.clearcutnetworks.com. 2007112200 14400 3600 604800 83604
;; Query time: 14 msec
;; SERVER: 192.168.0.8#53(192.168.0.8)
;; WHEN: Thu Nov 22 15:13:23 2007
;; MSG SIZE rcvd: 134
joao@por-0140:~$ dig zabbix.com mx
; <<>> DiG 9.4.1-P1 <<>> zabbix.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63719
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 1
;; QUESTION SECTION:
;zabbix.com. IN MX
;; ANSWER SECTION:
zabbix.com. 3600 IN MX 0 mail.zabbix.com.
;; AUTHORITY SECTION:
zabbix.com. 85366 IN NS ns3.nameresolve.com.
zabbix.com. 85366 IN NS ns4.nameresolve.com.
zabbix.com. 85366 IN NS ns1.nameresolve.com.
zabbix.com. 85366 IN NS ns2.nameresolve.com.
;; ADDITIONAL SECTION:
mail.zabbix.com. 3600 IN A 81.198.122.243
;; Query time: 160 msec
;; SERVER: 192.168.0.8#53(192.168.0.8)
;; WHEN: Thu Nov 22 15:13:39 2007
;; MSG SIZE rcvd: 149
joao@por-0140:~$ dig -x 81.198.122.243
; <<>> DiG 9.4.1-P1 <<>> -x 81.198.122.243
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 20163
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;243.122.198.81.in-addr.arpa. IN PTR
;; AUTHORITY SECTION:
122.198.81.in-addr.arpa. 10800 IN SOA ns.apollo.lv. hostmaster.apollo.lv. 2006103106 10800 3600 604800 38400
;; Query time: 316 msec
;; SERVER: 192.168.0.8#53(192.168.0.8)
;; WHEN: Thu Nov 22 15:14:15 2007
;; MSG SIZE rcvd: 104 -
I'm aware of this problem, it's shame it is still not fixed. For some reason we cannot do it quickly...Comment
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