Outlook 2013 don't receive emails

I have a severe problem with Outlook 2013 (I'm not the only one in the company but the most severe); this problem begins 3 weeks ago. When I open or click on F9, it says connected "send and received completed" but it doesn't synchronize with the servers, but I have installed and configure Thunderbird and it works perfectly (that discarts firewall, bad email server configuration, etc).

What can I do????
Daniel Flores OlmosInfrastructure and Support EngineerAsked:
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Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:
Can you telnet to your mail server on port 110 from your system?
Sudeep SharmaTechnical DesignerCommented:
Where are the emails hosted?

In house exchange or MS365 or some other ISP?

Make sure that Outlook is not in Offline mode.

Brian BEE Topic Advisor, Independant Technology ProfessionalCommented:
The fact that Thunderbird works tells us the mail is actually there, but it doesn't provide a complete solution since you may be retrieving your mail a different way between Thunderbird and Outlook.

The following two points assume you are using IMAP:
1. If you are running your Outlook in cached mode (where it downloads a local copy of each message), search for and delete the .OST file. Outlook will rebuild it.
2. If you are directly connected (no cache), the F9 function actually does nothing since all your email should show up right away. It does not mean that you don't have a problem though.

Since others in the company are having similar problems, I would speak to your mail administrator. They may be aware of the problem and have a solution, or some of this is intentional.

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Daniel Flores OlmosInfrastructure and Support EngineerAuthor Commented:
Emmanuel: I don't I have experience using Telnet, my email protocol is IMAP and the servers are: IMAP 143 and SMTP 2525

Sudeep: The emails are in an ISP host, not in an exchange server; where can I check the offline mode?

Brian: Others in the company have the same problem but only for a few hours, they received their emails instantly in their cell phones but sometimes (not always) it take hours to enter the emails to their Outlooks (only the people with Outlook 2013 has this problems, people with Outlook 2007 works perfectly) but finally they receive it, I have 2-3 weeks without receiving one single email through Outlook, while Thunderbird is working perfectly. By the other hand, I have contacted the ISP and they asked me to ping their server, use the web based mail interface, and everything is working fine (specially when users with Outlook 2007 doesn't have any complain at all).
Daniel Flores OlmosInfrastructure and Support EngineerAuthor Commented:

I've just deleted the .OST, reopen Outlook, and all the emails enter perfectly!! I'm happy now !!!
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