Hi all.
Sorry because my English.
I squeeze under debian use postfix.
# dpkg -l | grep postfix
ii postfix 2.7.1-1+squeeze1 High-performance mail transport agent
Such an experience last night:
1. (smtp) Ask about DNS MX records for the bond.com
2. (smtp) DSN response 0.0.0.0
3. (smtp) connect to 0.0.0.0
4. (smtpd) in localhost accept connection and received mail
5. (qmgr) mail in queue
6. GOTO 1.
I send myself a mail loop.
Unable to withstand this level of Postfix?
No connect to address 0.0.0.0 if response from DNS is 0.0.0.0.
The log details:
Jul 31 23:58:22 fw postfix/smtpd[17580]: 6ABF8F: client=localhost[127.0.0.1]
Jul 31 23:58:22 fw postfix/cleanup[18032]: 6ABF8F:
message-id=<20120731065514.5f401...@linux.xx.hu>
Jul 31 23:58:22 fw postfix/qmgr[7846]: 6ABF8F: from=<>, size=3109, nrcpt=1
(queue active)
Jul 31 23:58:22 fw postfix/smtp[18030]: 6ABF8F: to=<i...@bond.com>,
relay=0.0.0.0[0.0.0.0]:25, conn_use=24, delay=0.04, delays=0.01/0/0/0.02,
dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 6E00018E)
Jul 31 23:58:22 fw postfix/smtp[18030]: warning: numeric domain name in
resource data of MX record for bond.com: 0.0.0.0
Jul 31 23:58:22 fw postfix/qmgr[7846]: 6ABF8F: removed
Jul 31 23:58:22 fw postfix/smtpd[15695]: 6E00018E: client=localhost[127.0.0.1]
Jul 31 23:58:22 fw postfix/cleanup[18031]: 6E00018E:
message-id=<20120731065514.5f401...@linux.xx.hu>
Jul 31 23:58:22 fw postfix/qmgr[7846]: 6E00018E: from=<>, size=3109, nrcpt=1
(queue active)
Jul 31 23:58:22 fw postfix/smtp[18029]: 6E00018E: to=<i...@bond.com>,
relay=0.0.0.0[0.0.0.0]:25, conn_use=6833, delay=0.03, delays=0.02/0/0/0.01,
dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 74407F)
Jul 31 23:58:22 fw postfix/smtp[18029]: warning: numeric domain name in
resource data of MX record for bond.com: 0.0.0.0
Jul 31 23:58:22 fw postfix/qmgr[7846]: 6E00018E: removed
# dig mx bond.com
; <<>> DiG 9.7.3 <<>> mx bond.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56868
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0
;; QUESTION SECTION:
;bond.com. IN MX
;; ANSWER SECTION:
bond.com. 600 IN MX 1000 0.0.0.0.
;; AUTHORITY SECTION:
bond.com. 7950 IN NS ns2.digimedia.com.
bond.com. 7950 IN NS ns1.digimedia.com.
;; Query time: 145 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu Aug 2 08:22:23 2012
;; MSG SIZE rcvd: 95
Thank you.
--
[Varadi Gabor]
