[ARC5] Mail List "Spam" Filter- Need Guidance.

[Kenneth G. Gordon]

On 18 Oct 2011 at 10:54, J. Forster wrote:

> It's unclear how any particular filter works, and there are several
> layers:
> 
> QTH and Yahoo are the first layer.

Yahoo, hotmail, and gmail addresses are routinely rejected by SOME 
spam filters.

> Your own email server is another.
> 
> This is by no means definitive but a message will likely get trapped
> if:
> 
> The sender's name, etc., contains no vowels.
> If the send time is way off (hours).
> If it contains a blacklisted URL.
> If there is a lot of punctuation in the Subject line.
> If the message comes from a not-trusted relay.
> 
> Note that QRZ often gets blacklisted because SpamCop reports all URLs
> in a spam message, even those admin email addresses listed in
> messages.

Yes. Big PITA but, unfortunately, necessary.

Ken W7EKB