Yep, that is the answer. Just wanted to make sure I wasn't going crazy. Thanks!
From: Jonathan Link [mailto:[email protected]] 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 <[email protected]<mailto:[email protected]>> 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:[email protected]<mailto:[email protected]>] 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<tel:503.491.4343> -Direct | 503.492.8160<tel:503.492.8160> - Fax ________________________________ From: Jimmy Tran [mailto:[email protected]] 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<http://www.nitrodesk.com>) -----Original Message----- From: Liby Philip Mathew [[email protected]<mailto:[email protected]>] Received: Wednesday, 10 Apr 2013, 12:49am To: MS-Exchange Admin Issues [[email protected]<mailto:[email protected]>] 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<tel:%2B965%2024824600%20Ext.%20703> Fax: +965 24824500<tel:%2B965%2024824500> www.path-solutions.com<http://www.path-solutions.com/> [cid:[email protected]]<http://www.path-solutions.com/> From: Jimmy Tran [mailto:[email protected]] 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.... --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist Disclaimer [The information contained in this e-mail message and any attached files are confidential information and intended solely for the use of the individual or entity to whom they are addressed. This transmission may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you have received this e-mail in error, please notify the sender immediately and delete all copies. If you are not the intended recipient, any disclosure, copying, distribution, or use of the information contained herein is STRICTLY PROHIBITED. Path Solutions accepts no responsibility for any errors, omissions, computer viruses and other defects.] P Protect our planet: Do not print this email unless necessary. --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist
<<inline: image001.gif>>
