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Date:      Mon, 1 Jun 2015 12:42:37 -0700
From:      Charles Swiger <cswiger@mac.com>
To:        Aryeh Friedman <aryeh.friedman@gmail.com>
Cc:        FreeBSD - <freebsd-questions@freebsd.org>
Subject:   Re: best options for a *WORKING* MTA
Message-ID:  <98FAF194-39CB-4411-8196-B0886B60CF15@mac.com>
In-Reply-To: <CAGBxaXkfkh3HsLOvHX%2BGbFpWCjaxHTajW5bqJ7sTnfcGgWU9%2BQ@mail.gmail.com>
References:  <CAGBxaXn2OLg0ON8-YsNQbSDnJ8jEyqV6gFJANVyvtGtURSo8eg@mail.gmail.com> <CAHieY7S4_Et6fwLiqCVHF_CarrYOJZN-OYumcJD1daL56HCe=A@mail.gmail.com> <20150601145425.20b56f3a@seibercom.net> <CAGBxaX=9QabXstsWa4HNk9kX9o4RW-5v5N8L=kRnv6qpOE0k0Q@mail.gmail.com> <556CAD9A.6040005@radel.com> <CAGBxaX=dC5iqCyDLAjPLeNQ1h3FFgDJKDHVPceU830E=RXk7_g@mail.gmail.com> <37400.128.135.70.2.1433187108.squirrel@cosmo.uchicago.edu> <CAGBxaXkfkh3HsLOvHX%2BGbFpWCjaxHTajW5bqJ7sTnfcGgWU9%2BQ@mail.gmail.com>

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On Jun 1, 2015, at 12:39 PM, Aryeh Friedman <aryeh.friedman@gmail.com> wrote:
> from any other machine:
> telnet mailserver 25
> connection refused

Absent other information, I'd imagine your ISP is filtering port 25.
Run "tcpdump port 25" on mailserver and retry the remote telnet to confirm.

Regards,
-- 
-Chuck




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