email not delivered to outlook 2013

I have a user that did not receive an email from a gmail user.  I looked in exchange, I ran the following command:
get-messagetrackinglog -eventid deliver -sender "emailaddress" -start "2015-7-7 11:30" | fl recipients, sender, timestamp, eventid

So the response showed that the email was delivered.  See picture below.

But the problem is that I went the user's outlook and she did not receive the email. I checked the spam, junk and deleted folders and it's not there.  I even checked and there's no rules that move any emails over to any folders.

I'm not sure what gives, or how to check what is happening?

I'm running exchange 2013, and outlook 2013.
DanNetwork EngineerAsked:
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Satya PathakLead Technical ConsultantCommented:
follow the below steps:

1 Did you try to check OWA

2 . Also veryfy the log of gateway which you are usning.

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Does the email appears when you uncheck/turn off cached mode?

Here is how to turn off cached mode:

Uncheck the box in step # 4, Under Microsoft Exchange server, clear the Use Cached Exchange Mode check box.

If this fixed it then then your OST file may be corrupted and I normally would just delete the Outlook profile and recreate it then resync with Exchange.
DanNetwork EngineerAuthor Commented:
Thanks guys, I haven't had an issue since then, so not sure what the glitch was.
At the same time, I don't think the user received an email from that same sender since then, so perhaps the issue might not be resolved.
I'll try the cache mode if it happens again.
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