Dear Pak Syafril,
Mohon bantuan saya mengalami error ketika mengirim email ke google. Berkut 
adalah log dari smtp.log(out) nya.

Mon 2015-09-28 09:21:47.420: ----------
Mon 2015-09-28 09:20:25.304: Session 691086; child 0002
Mon 2015-09-28 09:20:25.304: Parsing message 
<c:\mdaemon\queues\remote\pd35000234781.msg>
Mon 2015-09-28 09:20:25.305: *  From: [email protected]
Mon 2015-09-28 09:20:25.305: *  To: [email protected]
Mon 2015-09-28 09:20:25.305: *  Subject: Order Atanaya
Mon 2015-09-28 09:20:25.305: *  Size (bytes): 2215430
Mon 2015-09-28 09:20:25.305: *  Message-ID: 
<[email protected]>
Mon 2015-09-28 09:20:25.321: Resolving MX record for gmail.com (DNS Server: 
116.66.206.66)...
Mon 2015-09-28 09:21:25.225: *  DNS: 60 second wait for DNS response exceeded 
(DNS Server: 116.66.206.66)
Mon 2015-09-28 09:21:25.226: Resolving MX record for gmail.com (DNS Server: 
8.8.8.8)...
Mon 2015-09-28 09:21:25.284: *  P=005 S=004 D=gmail.com TTL=(50) 
MX=[gmail-smtp-in.l.google.com]
Mon 2015-09-28 09:21:25.284: *  P=010 S=001 D=gmail.com TTL=(50) 
MX=[alt1.gmail-smtp-in.l.google.com]
Mon 2015-09-28 09:21:25.284: *  P=020 S=002 D=gmail.com TTL=(50) 
MX=[alt2.gmail-smtp-in.l.google.com]
Mon 2015-09-28 09:21:25.284: *  P=030 S=003 D=gmail.com TTL=(50) 
MX=[alt3.gmail-smtp-in.l.google.com]
Mon 2015-09-28 09:21:25.284: *  P=040 S=000 D=gmail.com TTL=(50) 
MX=[alt4.gmail-smtp-in.l.google.com]
Mon 2015-09-28 09:21:25.284: Attempting SMTP connection to 
gmail-smtp-in.l.google.com
Mon 2015-09-28 09:21:25.285: Resolving AAAA record for 
gmail-smtp-in.l.google.com (DNS Server: 8.8.8.8)...
Mon 2015-09-28 09:21:25.341: *  D=gmail-smtp-in.l.google.com TTL=(4) 
AAAA=[2404:6800:4003:c00::1a]
Mon 2015-09-28 09:21:25.341: Attempting SMTP connection to 
[2404:6800:4003:c00::1a]:25
Mon 2015-09-28 09:21:25.341: Waiting for socket connection...
Mon 2015-09-28 09:21:25.386: *  Connection established 
[2002:df1b:9353::df1b:9353]:55775 --> [2404:6800:4003:c00::1a]:25
Mon 2015-09-28 09:21:25.386: Waiting for protocol to start...
Mon 2015-09-28 09:21:26.069: <-- 220 mx.google.com ESMTP tc9si24256511pac.230 - 
gsmtp
Mon 2015-09-28 09:21:26.071: --> EHLO mail.atanaya.com
Mon 2015-09-28 09:21:26.314: <-- 250-mx.google.com at your service, 
[2002:df1b:9353::df1b:9353]
Mon 2015-09-28 09:21:26.314: <-- 250-SIZE 35882577
Mon 2015-09-28 09:21:26.314: <-- 250-8BITMIME
Mon 2015-09-28 09:21:26.314: <-- 250-STARTTLS
Mon 2015-09-28 09:21:26.314: <-- 250-ENHANCEDSTATUSCODES
Mon 2015-09-28 09:21:26.314: <-- 250-PIPELINING
Mon 2015-09-28 09:21:26.314: <-- 250-CHUNKING
Mon 2015-09-28 09:21:26.314: <-- 250 SMTPUTF8
Mon 2015-09-28 09:21:26.315: --> MAIL From:<[email protected]> 
SIZE=2215430
Mon 2015-09-28 09:21:26.553: <-- 250 2.1.0 OK tc9si24256511pac.230 - gsmtp
Mon 2015-09-28 09:21:26.553: --> RCPT To:<[email protected]>
Mon 2015-09-28 09:21:27.015: <-- 250 2.1.5 OK tc9si24256511pac.230 - gsmtp
Mon 2015-09-28 09:21:27.015: --> DATA
Mon 2015-09-28 09:21:27.251: <-- 354  Go ahead tc9si24256511pac.230 - gsmtp
Mon 2015-09-28 09:21:27.251: Sending 
<c:\mdaemon\queues\remote\pd35000234781.msg> to [2404:6800:4003:c00::1a]
Mon 2015-09-28 09:21:49.686: Transfer Complete
Mon 2015-09-28 09:21:50.624: <-- 550-5.7.1 [2002:df1b:9353::df1b:9353] Our 
system has detected that this message
Mon 2015-09-28 09:21:50.624: <-- 550-5.7.1 does not meet IPv6 sending 
guidelines regarding PTR records and
Mon 2015-09-28 09:21:50.624: <-- 550-5.7.1 authentication. Please review
Mon 2015-09-28 09:21:50.624: <-- 550-5.7.1  
https://support.google.com/mail/?p=ipv6_authentication_error for more
Mon 2015-09-28 09:21:50.624: <-- 550 5.7.1 information. tc9si24256511pac.230 - 
gsmtp
Mon 2015-09-28 09:21:50.624: --> QUIT
Mon 2015-09-28 09:21:50.639: Creating delivery failure DSN...
Mon 2015-09-28 09:21:50.639: *  Recipient: [email protected]
Mon 2015-09-28 09:21:50.639: *  Session-ID: 691086
Mon 2015-09-28 09:21:50.639: *  Queue-ID: pd35000234781.msg
Mon 2015-09-28 09:21:50.639: *  Message-ID: 
[email protected]
Mon 2015-09-28 09:21:50.639: --- End DSN message creation
Terim kasih atas bantuannya
Ali

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