I spoke to Shaw last week as valid emails from our business accounts
were being rejected by companies -
Upon further troubleshooting, we found that their complete netblock had
been listed on Spamhaus. They were frantically working on getting
themselves delisted - not sure if they managed.
This prompted them to block outbound port 25 on all customers except
those having static IP's - they claim this should have happened in 2007,
but due to an oversight, was never implemented properly in Calgary.
I also noticed on Friday, that our dynamic IP's (which hadn't changed in
the last 4 or 5 years) were suddenly refreshed to a completely different
netblock....
Now I understand the need to block port 25 - the thing I have an issue
with is the wholesale changes they make without any form of customer
communication and regard to consequences. I would not call this a
customer focused company in the least.
That being said, if you are on Shaw, and can live with their email
restrictions (400 recipients/1000 emails/hr) then you can use them as a
relay - shawmail.cg.shawcable.net
Martin
On 03/20/2011 03:17 PM, Gustin Johnson wrote:
I don't run any servers on Shaw anymore, I use them strictly for
connectivity. I know that a couple of years ago they intercepted
outgoing connections on port 25 for residential connections, I do not
know the state of SOHO. They did this then without notice, so it
would not surprise me if that behavior persists. I would expect that
most SOHO customers do not run their own servers, so they have just
implemented a change in response to a SPAM or virus threat. They have
also traditionally tended to do a rolling deployment so they can judge
end user impact. You may just be unlucky enough to be one of the
first.
The solution is to use a smarthost relay. I am finding that more and
more I am pushing more mail accounts on to hosted solutions, such as
Google Apps, Fastmail and so on. I personally only have one domain
left that I directly host, and since it is in a local co-lo facility
the cost/benefit ratio does not make sense. I am still sorting out
alternatives (it is looking like a VPS is the only really viable
option, and that is not much different than trusting Google not to
snoop or mess with your data).
When using a smart host to relay, you still have to use a different
port, typically 587 or 465, and typically you would use encryption and
authentication which can get a little tricky.
On Sun, Mar 20, 2011 at 9:51 AM, Kin Wong<kw...@csa-pdk.com> wrote:
I know in the past they have been tampering with the mail ports especially
in the downtown area for residential clients but had left the SOHO (small
office home office) alone. I can understand the reason for doing it but
should it be done in the first place and certainly should not be done
without warning.
On 3/20/2011 2:05 AM, Lance A. Brown wrote:
Kin Wong said the following on 3/20/2011 3:41 AM:
So the question is, has anyone else experiencing this problem with
Shaw? Any better on Telus? Should ISP be restricting port 25 for
their own email server? I think this should be the case and would
like to here some of your thoughts.
Can't speak for other services in Calgary, but TWC RoadRunner in NC (and
much of the U.S.) has restricted outbound port 25 traffic from their
non-business customers for years. Too much spam otherwise. They expect
you to funnel it through their servers so they can run spamchecks, etc.
I was forced to smarthost my home server's outbound email to another
server I have outside TWC networks several years ago.
--[Lance]
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