A few days ago I mentioned that I've had to reduce the weight I give to the spamdomains test...
drastically due to false positives. Here is an example of the type of thing I am running into:
Again, this isn't a criticism. I just wanted to show what is happening in the "real world".
Just a few notes here:
[1] The SPAMDOMAINS test should not be set up so that failing the SPAMDOMAINS test alone will block an E-mail (for exactly the reason you describe -- there are some services that send out E-mail on behalf of others that may be using a Hotmail or similar E-mail address).
[2] If an E-mail is caught and your SPAMDOMAINS test isn't weighted heavily enough to block the E-mail on its own, then the problem often lies with the sender. If someone is going to be sending out E-mail on behalf of their customers (such as Kodak and eBay), they need to make sure that their mailserver is set up perfectly. While it may be acceptable for a small company to have some problems with their mailserver (such as no reverse DNS entry), it isn't acceptable for a company the size of Kodak or eBay.
-Scott
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