Sickly DNS

Even things you really on sometimes break, been having a rooting problem
with mails to yahoo.com sub address ( BTINTERNET.COM, TALK21.COM, etc. etc).

this displayed its self as the everhappy

“11/21/2007 09:02:48 AM Router: No messages transferred to BTINTERNET.COM
(host mx1.bt.mail.yahoo.COM) via SMTP: SMTP Protocol Returned a Transient Error
11/21/2007 09:02:48 AM Router: No messages transferred to BTINTERNET.COM (host
mx2.bt.mail.yahoo.COM) via SMTP: SMTP Protocol Returned a Transient Error”

now normally you just shrug and know its gonna fix its self, after all its
“Transient”, but this one just kept on happening, solution, its the DNS
resolution of the mx record,

TEST:
1) Ping the mx1 record to get an IP address from the effected server, and form
somewhere else, see if there is a different IP address
2) If yes, then edit you “host” file, (im assuming windows server so most
likely c:Windowssystem32driversetchost) and add the entries eg.
“195.50.106.135 host mx1.bt.mail.yahoo.COM”
3) save the file, then stop and start your domino router, to trigger a resend
(“tell router quit”, “Load router”)
4) see if the mail routes

if it does then, your dns is sucking

SOLUTION:

1) refresh you DNS cache, open DOS box and type “Ipconfig /flushdns”

2) if that does not solve you problem ( after you have remembered to take the
host entries out), then its time to switch DNS suppliers (or just winch and
your isp), Matt White (http://www.11tmr.com) recommended http://www.opendns.com
, who i now use for my hosting servers

hope that spares someone misery.

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