Quote:
Originally Posted by Tiko
Why is it so difficult to find out from ntl exactly what e-mails they do block?
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Two reasons.
First, they use 2 block lists, Spamhaus and Spamcop. If a network email server appears in any one of those lists, and is NOT white listed (allowed even though it may be listed), then all connections from that email server are blocked until the server is removed from the list and ntl's servers updated.
Second, they use Brightmail content filtering, this usually does not block legitimate email, so it is unlikely that it is this system that is blocking mail you are expecting.
Therefore it is not possible to say with any accuracy what emails are being blocked, but if you know the SMTP server of the sender, and check the IP address of that server against the links below, you may get a vlue.
Spamcop
here
Spamhaus
here
Hope that helps.