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Problem Emailing to Gmail Email Addresses from Exchange 2013

I have an Exchange 2013 server having issues delivering emails to Gmail addresses (and/or googleapps hosted email). I'm receiving Delivery Delayed error when I check mail queue.

Error: 400 4.4.7

If I do a telnet test to the domain, it comes back OK, but emails are still delayed.

The IP address is not listed on any blacklists.

rDNS is ok.

Not sure what else to check... Any help would be appreciative.
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IAmDH
Asked:
IAmDH
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1 Solution
 
strivoliCommented:
What result do you get when running the SMTP test on your server with www.mxtoolbox.com?
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suribaba801Commented:
1 Verify whether it will get delivery delayed message when send to others(like hotmail,yahoo).

2 Try to use nslookup to resolve the DNS records of the gmail.

3 enable the protocol logging.It will help you to troubleshoot the issue,the below article for your reference:

http://technet.microsoft.com/en-us/library/bb124531.aspx

Hope it helps
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IAmDHAuthor Commented:
@strivoli see photo SMTP Test
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IAmDHAuthor Commented:
@suribaba801 I've already seen those steps online...
1. Only domain is gmail I'm unable to email to, but SMTPDiag Results shows connections successful
2. Here are the nslookup results nslookup3. Enabled logging already:
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IAmDHAuthor Commented:
Turns out that google says it's supposedly temporary... Not sure why it would happen like that.

Here's their troubleshooting wizard: https://support.google.com/mail/troubleshooter/2920052?hl=en&ref_topic=3404235

Screenshot of the result... Also looks like the emails are now going through
Gmail Troubleshooter
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IAmDHAuthor Commented:
Used GMail troubleshoot
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