Can't send mails to remote servers using MailEnable

[PauloS]

I´m having a problem that i can't find the solution...

I've looked all docummentations on the internet but any of then solved my problem..

I´m trying to send emails from my VS through MailEnable (program that is intalled by default by PLESK).
I can send to an recive emails from my own domais (abracodeurso.com.br) and recive e-mail from remote servers (e.g. hotmail.com and yahoo.com)

I did all configuration in Outlook express and looks to be working fine..
But when i try to send e-mail from an account created in plesk (e.g. ralph@abracodeurso.com.br) to ax external email (tony.carlson@yahoo.co.uk) this message get queued on outgoing folder...

My first thought was that MailEnable wasn't woink properly, so i downloaded Merak mail server, hMailServer and SmarterMail getting the same problem thought.

It's been 2 days that im stucked in this problem without any conclusion.. I don't know if it a problem with PLESK panel, or with MailEnable.

This is the message log from SMTP-Debug lod on MailEnable Log Folder:

10/01/09 07:39:35 ME-E0038: [E9BD69093948417798FC30D7AA6EC45B.MAI] Communications Error: Socket connection to mx-3.ibest.com.br failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:35 ME-I1350: [E9BD69093948417798FC30D7AA6EC45B.MAI] Attempting to connect to MX 4 of 7 (mx-5.ibest.com.br).
10/01/09 07:39:35 ME-E0038: [E67F9FA3E6144A4B8F898E3F066C1441.MAI] Communications Error: Socket connection to d.mx.mail.yahoo.com failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:35 ME-I1350: [E67F9FA3E6144A4B8F898E3F066C1441.MAI] Attempting to connect to MX 6 of 7 (b.mx.mail.yahoo.com).
10/01/09 07:39:35 ME-E0038: [F0835F5769A84734873AF8DD83AE927F.MAI] Communications Error: Socket connection to d.mx.mail.yahoo.com failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:35 ME-I1350: [F0835F5769A84734873AF8DD83AE927F.MAI] Attempting to connect to MX 6 of 7 (b.mx.mail.yahoo.com).
10/01/09 07:39:35 ME-E0038: [01BD6A7D402D45469519DE62FBB2C93D.MAI] Communications Error: Socket connection to d.mx.mail.yahoo.com failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:35 ME-I1350: [01BD6A7D402D45469519DE62FBB2C93D.MAI] Attempting to connect to MX 6 of 7 (b.mx.mail.yahoo.com).
10/01/09 07:39:36 ME-E0038: [E9BD69093948417798FC30D7AA6EC45B.MAI] Communications Error: Socket connection to mx-5.ibest.com.br failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:36 ME-I1350: [E9BD69093948417798FC30D7AA6EC45B.MAI] Attempting to connect to MX 5 of 7 (mx-6.ibest.com.br).
10/01/09 07:39:36 ME-E0038: [F0835F5769A84734873AF8DD83AE927F.MAI] Communications Error: Socket connection to b.mx.mail.yahoo.com failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:36 ME-I1350: [F0835F5769A84734873AF8DD83AE927F.MAI] Attempting to connect to MX 7 of 7 (f.mx.mail.yahoo.com).
10/01/09 07:39:36 ME-E0038: [01BD6A7D402D45469519DE62FBB2C93D.MAI] Communications Error: Socket connection to b.mx.mail.yahoo.com failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:36 ME-I1350: [01BD6A7D402D45469519DE62FBB2C93D.MAI] Attempting to connect to MX 7 of 7 (f.mx.mail.yahoo.com).
10/01/09 07:39:36 ME-E0038: [E67F9FA3E6144A4B8F898E3F066C1441.MAI] Communications Error: Socket connection to b.mx.mail.yahoo.com failed (error 10061). The host was either not contactable or it rejected your connection.
10/01/09 07:39:36 ME-I1350: [E67F9FA3E6144A4B8F898E3F066C1441.MAI] Attempting to connect to MX 7 of 7 (f.mx.mail.yahoo.com).

 

[prince]

check your firwall and make sure that ports 25 and 110 needed for email communication are not blocked

 

[PauloS]

I did that..

My firewall is not blocking any of this ports..
I´ve checked if i´m in any of Blak list and i´m not in ony of then..


I can´t solve this issue...
It´s been too complicated to me to understend what is happing with my server...

And I need help URGENTLY..