Jon Loeliger said:
Guys,
I ran through the http://spf.pobox.com/wizard.html yesterday.
Things went well enough. But then it said something interesting
about my DNS setup:
This should also appear in DNS:
chrome.jdl.com. IN TXT "v=spf1 a -all"
jdl.com. IN TXT "v=spf1 a -all"
mail.jdl.com. IN TXT "v=spf1 a -all"
www.jdl.com. IN TXT "v=spf1 a -all"
Interesting. I gues that begs the question about the
earlier statement:
jdl.com has 4 MX servers that receive mail for jdl.com.
Do they also send mail from jdl.com?
I was curious as to what the other 4 receivers were, or how
it came to this conclusion. In particular, there are several
machine names in my jdl.com domain, among them (www, chrome, mail,
ftp, cvs, loghost, etc). Why did it pick on www, chrome and mail?
The only listed MX is
jdl.com. 3296 IN MX 10 mail.jdl.com.
However...
# dig jdl.com
www.jdl.com. 3600 IN A 192.207.126.5
gets you the IP of 192.207.126.5 and when you look that up...
# dig -x 192.207.126.5
5.126.207.192.in-addr.arpa. 3600 IN PTR mail.jdl.com.
5.126.207.192.in-addr.arpa. 3600 IN PTR chrome.jdl.com.
5.126.207.192.in-addr.arpa. 3600 IN PTR jdl.com.
5.126.207.192.in-addr.arpa. 3600 IN PTR www.jdl.com.
Instead of using CNAME's, you have setup A RR's for the other names
you use on the same IP.
So when you lookup the IP 192.207.126.5 you get all four.
--
Kevin W. Reed - TNET Services, Inc.
Unoffical Exim MTA Info Forums - http://exim.got-there.com/forums
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