...because it's a coin toss whether or not I get this back:
554 Your connection from 199.188.200.88 has been rejected due to poor reputation.
I was replying to an email, from a Shaw customer, with valid References: and In-Reply-To: headers. I'm on a Telus IP (my mail server isn't) and my email contained no links or anything else that might be considered spam. My mail server's IP is also not listed in any of the 90 blacklists that MXToolbox.com checks.
A few years ago when we used Shaw email at work we discovered we couldn't receive email from the ~10% of our customers who use Yahoo. They received this exact bounce message - sometimes. Sometimes, our incoming mail just disappeared. Shaw acknowledged the problem, but refused to fix it, and seemed unconcerned when we stopped using them.
Is anyone aware of a way an individual customer can whitelist a specific IP?
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