On Tue, Sep 21, 2004 at 03:06:06AM +0200, Marco d'Itri wrote:
> On Sep 21, Wouter Verhelst <wouter@grep.be> wrote:
>
> > My ISP blocks port 25/outgoing. Now what?
>
> md@wonderland:~$grep submission /etc/services
> submission 587/tcp # Submission [RFC2476]
Oh, I suppose there are any number of options to subvert the problem
that you can't do many things. UUCP is one. This could be another (if
it's not part of the UUCP protocol suite -- I have no clue about what
UUCP does, other than that it can be used to send mail). rsync'ing mail
spools could be one (although a very ugly one I wouldn't want to be
involved with). Using another protocol suite as a transport (i.e., IPv6)
is another one, and what I do.
The point is, though, that on the Internet, mail runs on SMTP-over-IPv4.
Getting the mail out there is one thing, but you can't run a primary MX
which only does UUCP. Or SMTP-over-IPv6. Nor can you send mail to other
hosts on the internet if you can't access their 25/tcp over IPv4.
And that sometimes switching networks isn't an option. Whether that is
because there simply is no other ISP, whether the other ISP is too
expensive, or whether the alternatives are even worse, doesn't actually
matter.
--
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AIR -- mud -- FIRE
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WATER
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