sorry for not include this test, we did this yesterday
this is the answer of telnet:
220 smtp.didage.org.mx ESTMP Mirapoint 3.8.1 -FCS; Wed, 24 Jan 2007 
11:45:46 -0600 (CST)

Nathan Brindle wrote:
> Can you telnet to port 25 of 148.244.85.213 from the LISTSERV machine, or not?
>
> If you can't, then the problem is outside of LISTSERV.
>
> Nathan
>
> At 11:17 AM 1/24/2007 -0600, you wrote:
>   
>> Hello again.
>>
>> I will try to be more specific about the problem we have with ListServ 14.5 on a Windows 2000 server machine. I hope I can make my self clear this time.
>>
>> Everything was working just fine:
>> -Windows 2000 Server IP 200.56.226.202
>> -ListServ 14.5
>> -Mirapoint from Razor Gate as the SMTP IP 200.56.226.203
>> -site.cfg
>>  NODE=DIDAGE.ORG.MX
>>  SMTP_FORWARD=200.56.226.203
>>  SMTP_FORWARD_1=4*200.56.226.203
>>  MYDOMAIN=DIDAGE.ORG.MX
>>
>> Then my ISP asked us to change the IP because they had to change their IP's blocks.
>> So we proceeded to do the changes:
>> -We changed the Windows Server IP. (148.244.85.212)
>> -We changed the Mirapoint IP. (148.244.85.213)
>> -We changed the site.cfg file:
>>  NODE=DIDAGE.ORG.MX
>>  SMTP_FORWARD=148.244.85.213
>>  SMTP_FORWARD_1=4*148.244.85.213
>>  MYDOMAIN=DIDAGE.ORG.MX
>> -We also changed the DNS records (A and MX too).
>>
>> Now we can't send any email throghout the ListServ.
>> The log file says that the ListServ is receiving emails.
>>
>> Thanks to all of you, who had responded to us we have did some tests to see what's wrong, but none of this was usefull:
>> -Disabling and enabling the Firewall (OfficeScan, by the way).
>> -We have the Group Mail software and it worked fine, we can send emails through it.
>> -We tried with less SMTP workers.
>> -A log file (SMTPS#1-20070124.LOG) example line: 24 Jan 2007 00:00:12 Receive error: Unknown error [10060]
>>
>> So please let me know if I have missed something in the configuration or what.
>>
>> Best regards,
>>     
>
>
>