North American Network Operators Group|
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Misguided SPAM Filtering techniques
I'm seeing an increasing variety of misguided SPAM blocking techniques such
that they are starting to become more and more annoying, and, I'm curious as
to what solutions/work-arounds others have deployed, and, if anyone has any
ideas on how to get these tactics reduced/stopped?
Here's the primary hinderance.
I use an authenticated TLS-protected mailhost at home for submitting my email for delivery. Unfortunately, networks have taken to:
outright blocking 25 and 587 except to their own servers. proxying all 25/587 connections in a manner incompatible with TLS proxying all 25/587 connections in a manner incompatible with SMTPAUTH blocking TLS startup on 25/587 connections
Primarily, I have run up against this in the following networks:
SPRINT Cellular network (can no longer send email from my phone) Public wireless networks Hotel networks Other WiFi hotspots Some DSL providers networks
I can't imagine that these tactics actually do anything to significantly reduce
the amount of spam delivered to the internet, so, I'm curious as to:
1. Why are they used? 2. How do we convince operators to abandon them? 3. How prevalent is this problem, and, is it growing as I perceive?