Tiba-tiba saja user lambat sekali utk kirim email local / outside, dengan log sbb :
Ada pesan :

Error: 45 second wait for DNS response exceeded

Kenapa ya ?
Thanks

Wed 2010-06-09 16:08:01: Session 179; child 2; thread 2844
Wed 2010-06-09 16:07:15: Accepting SMTP connection from [117.102.88.188 : 3451] Wed 2010-06-09 16:07:15: Performing PTR lookup (188.88.102.117.IN-ADDR.ARPA) Wed 2010-06-09 16:08:00: * Error: 45 second wait for DNS response exceeded Wed 2010-06-09 16:08:00: * Error: Name server reports domain name unknown
Wed 2010-06-09 16:08:00: *  No PTR records found
Wed 2010-06-09 16:08:00: ---- End PTR results
Wed 2010-06-09 16:08:00: --> 220 pttdp.com ESMTP MDaemon 9.5.6; Wed, 09 Jun 2010 16:08:00 +0700
Wed 2010-06-09 16:08:00: <-- EHLO [127.0.0.1]
Wed 2010-06-09 16:08:00: --> 250-pttdp.com Hello [127.0.0.1] (may be forged), pleased to meet you
Wed 2010-06-09 16:08:00: --> 250-ETRN
Wed 2010-06-09 16:08:00: --> 250-AUTH=LOGIN
Wed 2010-06-09 16:08:00: --> 250-AUTH LOGIN CRAM-MD5
Wed 2010-06-09 16:08:00: --> 250-8BITMIME
Wed 2010-06-09 16:08:00: --> 250 SIZE 0
Wed 2010-06-09 16:08:00: <-- AUTH CRAM-MD5
Wed 2010-06-09 16:08:00: --> 334 PE1EQUVNT04tRjIwMTAwNjA5MTYwOC5BQTA4MDA4OTBNRDAwMTJAcHR0ZHAuY29tPg== Wed 2010-06-09 16:08:00: <-- anVudXMgY2I0MzFmZDhiZWE5YzM4YWEyYmQ1NTdhNTkxYzBmNTA=
Wed 2010-06-09 16:08:00: --> 235 Authentication successful
Wed 2010-06-09 16:08:00: Authenticated as [email protected]
Wed 2010-06-09 16:08:00: <-- MAIL FROM:<[email protected]> SIZE=2047
Wed 2010-06-09 16:08:00: --> 250 <[email protected]>, Sender ok
Wed 2010-06-09 16:08:00: <-- RCPT TO:<[email protected]>
Wed 2010-06-09 16:08:00: --> 250 <[email protected]>, Recipient ok
Wed 2010-06-09 16:08:01: <-- RCPT TO:<[email protected]>
Wed 2010-06-09 16:08:01: --> 250 <[email protected]>, Recipient ok
Wed 2010-06-09 16:08:01: <-- RCPT TO:<[email protected]>
Wed 2010-06-09 16:08:01: --> 250 <[email protected]>, Recipient ok
Wed 2010-06-09 16:08:01: <-- DATA
Wed 2010-06-09 16:08:01: Creating temp file (SMTP): c:\mdaemon\queues\temp\md50000000102.tmp
Wed 2010-06-09 16:08:01: --> 354 Enter mail, end with <CRLF>.<CRLF>
Wed 2010-06-09 16:08:01: Message size: 2047 bytes
Wed 2010-06-09 16:08:01: Passing message through AntiVirus (Size: 2047)...
Wed 2010-06-09 16:08:01: *  Message is clean (no viruses found)
Wed 2010-06-09 16:08:01: ---- End AntiVirus results
Wed 2010-06-09 16:08:01: Message creation successful: c:\mdaemon\queues\inbound\md50000755978.msg Wed 2010-06-09 16:08:01: --> 250 Ok, message saved <Message-ID: [email protected]>
Wed 2010-06-09 16:08:01: <-- QUIT
Wed 2010-06-09 16:08:01: --> 221 See ya in cyberspace
Wed 2010-06-09 16:08:01: SMTP session successful (Bytes in/out: 2272/598)

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