Date: Wed, 13 Oct 2004 13:25:46 -0500 From: Eric Crist <ecrist@secure-computing.net> To: Ed Budd <ebudd@grokking.org> Cc: freebsd-questions@freebsd.org Subject: [SOLVED] Re: [OT] Error sending mail from off-network... (details inside) Message-ID: <4CB7DB10-1D45-11D9-8BCD-000D9333E43C@secure-computing.net> In-Reply-To: <416D4432.2060705@grokking.org> References: <21FF4504-1CBE-11D9-8C19-000D9333E43C@secure-computing.net> <b2807d0404101305004ccfad61@mail.gmail.com> <03BAFF18-1D20-11D9-AAE0-000D9333E43C@secure-computing.net> <416D4432.2060705@grokking.org>
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--Apple-Mail-1--874338102 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; format=flowed On Oct 13, 2004, at 10:05 AM, Ed Budd wrote: > Eric Crist wrote: >> On Oct 13, 2004, at 7:00 AM, Subhro wrote: >>> Are you authenticating yourself before attempting to send out mail to >>> the ISP SMTP. To prevent spammers, almost all ISPs allow the use of >>> their SMTPs only after you prove them that you are really a >>> legitimate >>> customer. Also many ISPs wont allow you to use their mailservers >>> unless the IP which you are using (rather which had been assigned to >>> you) belongs to their own pool. >>> >>> Regards >>> S. >> I am trying to use my own SMTP server, not my ISPs. Not only that, >> but I AM trying to authenticate. As I said in my previous post, I >> can send when dialing in to the 'net, but not when connecting from >> the ghetto network I'm on here. Only SMTP traffic seems to be >> stopping/timing out. I can receive mail just fine. > > I had this problem once at a hotel. Turned out the hotel was > transparently intercepting smtp traffic and funnelling it through > their own relays. T-Bird's CRAM-MD5 auth was failing because their > relays didn't support it. Try telnetting to what you think is your > smtp server and see if your own banner comes up or something else -- > that's how I discovered what was happening. It was a little unnerving > until I figured it out. > > Out of spite I just tunnelled everything through ssh. How dare they > f**k with my mail! > > EB Yeah. Shortly after sending my last email, I did just that. Their server responds that it _is_ my server, but AUTH and other things don't work. I'm staying at a hotel, but I just so happen to be installing new access-control hardware for this casino, which owns the hotel. Their MIS/IT staff aren't the brightest, and I've come to learn that there is not SMTP server setup to handle the funneling. Kinda ironic - they funnel to their non-existent mail server. To fix this, I opened a non-standard port on my mail server and was using that. What I realized was they aren't blocking 465, which is open for SSL, which I had just forgotten to setup on this new laptop (bought it two days before going out of town). Long story short - their IT staff aren't the brightest. Thanks! ----- Eric F Crist Secure Computing Networks --Apple-Mail-1--874338102 content-type: application/pgp-signature; x-mac-type=70674453; name=PGP.sig content-description: This is a digitally signed message part content-disposition: inline; filename=PGP.sig content-transfer-encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) iEYEARECAAYFAkFtcyoACgkQRAAY9knOW+pcLQCfTxtZeaWD0gHVNYC/rjFN06PU gw0AmwcjPQjuSbwUbaev6XlDiERopO9X =QrMF -----END PGP SIGNATURE----- --Apple-Mail-1--874338102--
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