On Thu, 29 Jul 2004 21:39:44 -0700 (PDT) Griffin Palmer <[EMAIL PROTECTED]> spake thus:
> This may be one for the firewalls list, but I'm not > entirely sure this is a firewall issue, or, at least, > *entirely* a firewall issue. I'm pretty sure it's not > an exim issue. > > I thought I'd see if there are any troubleshooting > suggestions from this obviously very experienced user > base, before trying more specialized lists. > > I've just installed testing/unstable on my machine. > > I'm running behind a NAT DSL router, with iptables on > my machine. > > I have my own domain, running its own DNS, smtp host, > http host, etc. > > I'm using exim 4.41, compiled from source, as my MTA. > > I was earlier running exim 3.36-11 on another box, > behind the same router, using identical port > forwarding. But in the fresh install on more robust > hardware, something has gone amiss. > > I'm pretty sure it's not exim. All the diagnostics > check out for exim. I can send from and reply to > local-domain addresses, using either mutt or mail. > > I can also send messages to the outside world. But > replies (or original messages) from the outside world > fall on deaf ears. Eventually, I get an "I've given up > trying" message from my ISP's MTA -- except in one > instance (more on that below). > > Here's where it gets confusing. Running nmap against > my machine from outside the domain shows it is > answering that Port 25 is closed. This even though, > using FireStarter, I've explicitly opened Port 25. > > I'm *certain* I've properly forwarded Port 25 to the > correct IP address for my new machine. > > Here's another oddity: Even though my machine replies > 'closed' to Port 25 scans, I got one error reply with > one message attempt from my ISP account that suggests > the port isn't *entirely* closed. > > Thinking I might have DNS configuration problems, I > tried sending a message to [EMAIL PROTECTED] (my > user name and IP address substituted for this dummy > address). I didn't realize at the time you had to > configure exim to accept mail addressed in this > fashion. > > I got an error message back informing me that exim had > refused to forward the dotted-quad-addressed message > to my account on my host. > > So it seems as if *something* is getting through on > Port 25. > > It doesn't seem, though, that it's a matter of > messages reaching my host and then exim failing to > properly forward them locally: There are no > unforwarded messages languishing on exim's input > queue. > > Any troubleshooting ideas would be appreciated. > > Griff Palmer is it feasible that your ISP now filters inbound smtp possibly as an anti-spam or anti-virus measure? HTH LukeK -- Luke Kearney <[EMAIL PROTECTED]> -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
