<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt">Make sure that IPTables isn't filtering port 25. Many installations by default install a firewall package that filters all incoming traffic. You would expressly have to open any port you wanted the machine to listen on. Depending on your distribution, you may find /etc/init.d/iptables set up to run when the machine boots. By default, it installs a block all incoming rule.<br><br>Hope this helps...<br><br>Cheers!<br><br>Bob<br><div> </div>--<br>"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return."<br> --Leonardo da Vinci<div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><br><div style="font-family: times new roman,new
york,times,serif; font-size: 12pt;">----- Original Message ----<br>From: Robert Wolfe <robertwolfe@localnet.com><br>To: nflug@nflug.org<br>Sent: Wednesday, December 26, 2007 3:29:59 PM<br>Subject: Re: [nflug] RHEL 5.1/PostFix Refusing Remote Connections<br><br>
Erek Dyskant wrote:<br>> Robert,<br>> Your ISP is probably filtering port 25 outside of their network,
as<br>> ISPs have had so many problems with open relays sucking up all their<br>> bandwidth. Sadly to run a mail server these days one generally needs
to<br>> have a dedicated server or a business-class connection these days.<br>> Call your ISP to ask what ports they filter, and see if there's
any way<br>> you can convince them you know what you're doing (if your ISP is<br>> localnet you may be in luck <grin>)<br>> Best of luck.<br>><br>> --Erek<br>> <br><br>Actually, if I switch over to my Windoze-based mail server, SMTP
traffic <br>flows just fine over port 25.<br><br>--<br>Robert Wolfe<br>Systems Administrator<br>LocalNet Corp.<br>CoreComm Internet Services<br>(517) 664-8924<br><br>_______________________________________________<br>nflug mailing list<br><a ymailto="mailto:nflug@nflug.org" href="mailto:nflug@nflug.org">nflug@nflug.org</a><br><a href="http://www.nflug.org/mailman/listinfo/nflug" target="_blank">http://www.nflug.org/mailman/listinfo/nflug</a><br></div><br></div></div><br>
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