[RndTbl] Shaw blocking port 25 on business line

Adam Thompson athompso at athompso.net
Tue Feb 4 21:51:47 CST 2020

On 2020-02-04 21:04, Gerald Brandt wrote:

> Of course I've tried to get new IPs. I've had nothing but resistance. I've made another attempt today, so now I wait for a response.

Unfortunately, Hartmut is right in this regard.  Trying will not solve
your problem, only succeeding will.  Until you succeed at that, I
strongly recommend you route all outbound mail through a proxy or relay
server, because otherwise you will be wasting your time. 

The only option I know of is to reach Shaw's retention team; just like
cell carriers, the retention team is the only group actually empowered
to fix things for you.  In this case, I suggest you _*ahem*_ relent if
they send a business tech out to your site, who demonstrates before
leaving that you have a static IP, DHCP is disabled, reverse DNS is set
(correctly), and you can once again send email. 

MTS also has business service, and if sending email is your main use
case, their business DSL service is probably good enough.  So you call
Shaw, tell them you're switching to MTS because Shaw has consistently
failed to address your problem.  And if they say "OK, have fun with
MTS", switch.  You literally can't get any worse off than you are right

And if you have the same problem with MTS (which you almost can't
because YOU aren't in control of your IP address, they are, ergo you
can't really get it wrong) then... um... there's only one common element

SMTP email pretty much requires a specialist nowadays.  If you haven't
devoted, eh, let's say 10yrs (cumulatively, assuming standard working
hours) of your life to managing and running public SMTP servers, I'd
estimate >50% odds that the problem somehow, somewhere, lies on your
end.  Maybe the proximate problem is Shaw, but I've never had problems
like you're describing with getting their business service to do the
right thing. 

If you continue to have problems, there's a small chance I might be able
get your complaint routed to someone capable within Shaw; email me
directly if you want to try that before threatening to leave them. 

Also, maybe tell us what the router is, and what the SMTP server is - I
don't think we know those details yet.  Although ESR is a walking
dumpster fire, this article of his remains relevant (albeit tone-deaf)
today: http://www.catb.org/~esr/faqs/smart-questions.html 

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