Re: [cobalt-users] Port 25 Email blocked by ISP

["E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>]

JL> Date: Sat, 12 Apr 2003 00:04:56 -0700
JL> From: Jeff Lasman


JL> EBD> Sounds like residential cable or DSL service... probably TOS
JL> EBD> violation to run a server.  And, really, residential-grade
JL> EBD> connectivity isn't the best way to run a service.
JL>
JL> Eddy, it doesn't read that way to me.  To me it reads that his RaQ is
JL> fine and can use port 25, but he, probably at home, wants to use his RaQ
JL> SMTP server for outgoing email instead of his ISPs mail server for
JL> outgoing email.

Ahhhh.  Hmmmm.  In that case, he might consider a VPN or tunnel
if his ISP doesn't block those.  I've heard some ISPs block IPSec
or similar on "residential" connections, which I think is rather
slimy.


JL> It may or may not be in the ISP's TOS; if it's not, then he can
JL> certainly use a different port to reachhis RaQ, if he's willing to face
JL> the consequences.  But of course his ISP could cancel him anyway, and/or
JL> change the TOS.  Changing his ISP may be his best solution, but it's
JL> getting harder and harder to find ISPs that don't block outgoing port
JL> 25.  When we did dialup internet access service we blocked it.  The
JL> reason is simple... the anti-spam world is going to hold us liable for
JL> spam originating on our network.  If it doesn't go through our servers
JL> it's not in our logs and it's a lot harder to track (can be done,
JL> through radius logs, but much harder).

Yup.  IMHO, ISPs should at least consider allowing outbound
25/TCP for those who have static IP addresses or netblocks.  For
dynamic customers, forget it.


JL> We now offer POP before SMTP for clients who want to use our outgoing
JL> server, but we neither recommend it, nor do we try to "fix" it when it
JL> doesn't work, as it's almost certainly an ISP issue.

Yes.  Personally, I prefer using SASL... but Netscape 4.7 is a
bit obnoxious when it sees that it _can_ authenticate, and
decides that it _must_ authenticate.  IOW, if one has clients
running NS 4.7 email, a flag day is required to implement SASL.
Bleah. :-(


Eddy
--
Brotsman & Dreger, Inc. - EverQuick Internet Division
Bandwidth, consulting, e-commerce, hosting, and network building
Phone: +1 (785) 865-5885 Lawrence and [inter]national
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