Good to know!!

Sent on the run!

On 10 Apr 2013, at 19:53, Jimmy Tran <ji...@jt-solution.com> wrote:

> Yep, that is the answer.  Just wanted to make sure I wasn’t going crazy.
>  
> Thanks!
>  
> From: Jonathan Link [mailto:jonathan.l...@gmail.com] 
> Sent: Wednesday, April 10, 2013 10:29 AM
> To: MS-Exchange Admin Issues
> Subject: Re: telnet to smtp mail server Q
>  
> Because Comcast blocks port 25...
>  
> 
> On Wed, Apr 10, 2013 at 1:17 PM, Jimmy Tran <ji...@jt-solution.com> wrote:
> I am testing this from my home network which is Comcast to my office.  I 
> don’t use port 587, only 25.  From inside my office I can telnet to my 
> internal exchange ip fine.  If I use the public ip it will fail due to some 
> NAT polices I haven’t configured yet which is why I’m trying from home and 
> other locations besides my office network.
>  
> I still don’t know why email comes in on port 25 from other email servers but 
> I cannot connect through a telnet session.  McAfee or any other similar 
> software is not installed on the machine.
>  
>  
> From: Steve Hart [mailto:sh...@wrightbg.com] 
> Sent: Wednesday, April 10, 2013 9:30 AM
> 
> To: MS-Exchange Admin Issues
> Subject: RE: telnet to smtp mail server Q
>  
> There may be a firewall rule on your network preventing outbound port 25 
> connections from everything but your mail servers. That’s a common rule to 
> stop spambots on internal networks from getting out.
>  
> Steve
>  
>  
>  
> Steve Hart
> Network Administrator
> 503.491.4343 -Direct | 503.492.8160 - Fax
> From: Jimmy Tran [mailto:ji...@jt-solution.com] 
> Sent: Wednesday, April 10, 2013 12:51 AM
> To: MS-Exchange Admin Issues
> Subject: RE: telnet to smtp mail server Q
>  
> No Mcafee. Just Microsoft security essentials
> 
> Sent from my Android phone using TouchDown (www.nitrodesk.com)
> 
> -----Original Message----- 
> From: Liby Philip Mathew [lmat...@path-solutions.com]
> Received: Wednesday, 10 Apr 2013, 12:49am
> To: MS-Exchange Admin Issues [exchangelist@lyris.sunbelt-software.com]
> Subject: RE: telnet to smtp mail server Q
> 
> Are you using McAfee on the PC?  If so, probably it is blocking port 25.  
> Just a thought.
>  
> Regards
> Liby Philip Mathew | Principal Systems Administrator
> ICT Professional Services
> Path Solutions
> Tel: +965 24824600 Ext. 703
> Fax: +965 24824500
> www.path-solutions.com
> 
> <image001.gif>
> 
>  
> From: Jimmy Tran [mailto:ji...@jt-solution.com] 
> Sent: Wednesday, April 10, 2013 09:39
> To: MS-Exchange Admin Issues
> Subject: telnet to smtp mail server Q
>  
> Im having a brain fart right now.  I’m trying to telnet to a smtp server from 
> outside of that network on port 25 but I get a connection refused.  When I 
> send an email from outside  to that domain, the mail goes through to the 
> recipient.
>  
> Why can’t I telnet in on port 25? What am I missing?  I’m making sure I 
> telnet to the mx record on port 25 from outside and no go….
>  
>  
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