id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
11330	djangoproject.com mailservers misconfigured	bacs	nobody	"Email from djangoproject.com (when registering for an account) comes from servers with mismatched PTR records.  This caused email to be rejected by many systems performing standard anti-spam checks.

The reverse DNS for the IP should resolve to an hostname that resolves back to the same IP.  It doesn't.
{{{
# dig -x 64.207.133.30

; <<>> DiG 9.5.1-P1 <<>> -x 64.207.133.30
;; global options:  printcmd             
;; Got answer:                           
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18668
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;30.133.207.64.in-addr.arpa.    IN      PTR

;; ANSWER SECTION:
30.133.207.64.in-addr.arpa. 39355 IN    PTR     djangoproject.com.

;; AUTHORITY SECTION:
133.207.64.in-addr.arpa. 82555  IN      NS      ns1.mediatemple.net.
133.207.64.in-addr.arpa. 82555  IN      NS      ns2.mediatemple.net.

;; ADDITIONAL SECTION:
ns1.mediatemple.net.    160386  IN      A       64.207.129.18
ns2.mediatemple.net.    160386  IN      A       64.207.128.18

;; Query time: 25 msec
;; SERVER: 212.110.164.222#53(212.110.164.222)
;; WHEN: Wed Jun 17 09:53:29 2009
;; MSG SIZE  rcvd: 158

# dig djangoproject.com

; <<>> DiG 9.5.1-P1 <<>> djangoproject.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22654
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;djangoproject.com.             IN      A

;; ANSWER SECTION:
djangoproject.com.      600     IN      A       64.207.133.18

;; AUTHORITY SECTION:
djangoproject.com.      168943  IN      NS      ns1.mediatemple.net.
djangoproject.com.      168943  IN      NS      ns2.mediatemple.net.

;; ADDITIONAL SECTION:
ns1.mediatemple.net.    160374  IN      A       64.207.129.18
ns2.mediatemple.net.    160374  IN      A       64.207.128.18

;; Query time: 155 msec
;; SERVER: 212.110.164.222#53(212.110.164.222)
;; WHEN: Wed Jun 17 09:53:42 2009
;; MSG SIZE  rcvd: 134
}}}"		closed	*.djangoproject.com	1.0		fixed			Accepted	0	0	0	0	0	0