sugarcrm can't find gmail host

[yu xintian]

Hi, all .
I'm configuring Sugarcrm to send and receive email to Gmail . My computer's information is:

» Operating system type and version Fedora11
» Sugar version and edition Sugar Community Edition Version 5.2.0j
» Webserver type and version httpd-2.2.13-1
» PHP version php-5.2.9-2.fc11.i586
» MySQL server version mysql-5.1.37-1.fc11.i586

This is what I have in Admin->email settings : (for others ,I used "Prefill gmail defaults " option )
SMTP Username: yuxintian101@gmail.com SMTP Password: ***********

The problem happens in configuring Activities ->Emails ->settings ->Mail Accounts:

Name: admin
From Name: Administrator
From Address: yuxintian101@gmail.com
User Name: yuxintian101@gmail.com
Password: **************
Mail Server Address: imap.gmail.com
Mail Server Protocol: IMAP
Monitored Folders: INBOX
Trash Folder: ******
Sent Folder: *******
Mail Server Port: 993
Use SSL: Yes
Outgoing Mail Server : ( set gmail defaults )

When I click "Test settings" ,I always get a messagebox saying :"No such host as imap.gmail.com"

The configuration in my Gmail account is Settings -> Forwarding and POP/IMAP:

Forwarding : Diabled ( I disabled this because my website is infcompany.dyndns.com and I don,t know how to write the email address . Is it admin@infcompany.dyndns.com/sugar ??? )
POP Download : Enabled
IMAP Access : Enabled

I have struggled with this issue whole day . I am very glad to receive any advice. Thank you !!

[yu xintian]

And also, when I use http://imap.gmail.com in Activiyie -> email -> settings ->accounts , it shows : Can't open mailbox {http://imap.gmail.com:993/service=imap}INBOX: invalid remote specification

I really have my account and password right ,believe me .

[wdroush]

What happens when you ssh into the server and type this:
telnet imap.gmail.com 993

You should get

Trying 74.125.127.109...
Connected to gmail-imap.l.google.com.
Escape character is '^]'.

If not it's a Fedora network configuration error.

[yu xintian]

Hi, Wdroush. Glad to get your advice. I got the screen when I tapped in the coomand you gave there. So I think the problem is not in Fedora Network . Do you think it is something of my website ? I use http:// *******.dyndns.org . Is it a kind of problem ? Thank you !

[wdroush]

Hi, Wdroush. Glad to get your advice. I got the screen when I tapped in the coomand you gave there. So I think the problem is not in Fedora Network . Do you think it is something of my website ? I use http:// *******.dyndns.org . Is it a kind of problem ? Thank you !

What if you type in "74.125.127.109" instead of imap.gmail.com (on the e-mail client)?