Re: SMTP Problem

• Subject: Re: SMTP Problem
• From: Philip Ershler <email@hidden>
• Date: Fri, 24 Jul 2009 09:24:59 -0600
• Delivered-to: email@hidden
• Delivered-to: email@hidden

On 24 Jul 2009, at 1:47pm, GARRISON, TRAVIS J. wrote:

Here is the issue I'm having, that I can't seem to get my head wrapped around, as it only happens to one user.

When this user sends an email from their computer at work, everything works fine, and if they take that computer to Panera, or any other WiFi hot spot, everything also works fine.

However, when they take their computer home, they are unable to send messages.

Your problem is probably that your users are submitting mail to the server using port 25. Many ISPs block port 25 allowing only mail submissions to their own mail servers on that port.

To get around this you need to set up your server to accept mail submission on the mail submission port 587, what you should have done in the first place. Then have all your users re-configure their mail clients to use port 587 instead of port 25 for SMTP mail.

Thanks, Phil

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