about the A and PTR for sending mail
shorttag at gmail.com
Thu Nov 10 01:57:07 UTC 2011
I know maybe this is not related to DNS question, so please excuse me
if it's not that suitable.
I have two server IPs, the A records for them are:
mail.dnsbed.com. 300 IN A 126.96.36.199
mail.dnsbed.com. 300 IN A 188.8.131.52
The corresponding PTR records are:
184.108.40.206.in-addr.arpa. 36466 IN PTR dnsbed.com.
220.127.116.11.in-addr.arpa. 36453 IN PTR dnsbed.com.
But this setting can't make email sending successful.
The Postfix system says:
postfix/smtp: A65713180D9: to=<***@freenet.de>,
delays=0.29/0.02/0.76/0.16, dsn=5.0.0, status=bounced (host
mx.freenet.de[18.104.22.168] said: 550 inconsistent or no DNS PTR
record for 22.214.171.124 (see RFC 1912 2.1) (in reply to RCPT TO
Is there any RFC item said the A and PTR records must be consistent?
And why they must?
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