I checked on Spamhaus site and i'm in the pbl list.
This pages tells me that I just need to make sure that my email client
If you are simply using normal email software, such as Outlook, Entourage, Thunderbird, Apple Mail, and you are being blocked by a Spamhaus PBL listing when you try to send email, the reason is simply that you need to turn on "SMTP Authentication" in your email software settings (Tools : Accounts : Properties : Outgoing Mail Server : Check the "My server requires authentication" box). You do NOT need to remove your IP address from the PBL.
But I had thought I had done that. My server only allows SASL and is turned on. But somehow Spamhaus doesn't accept my SASL.
Any ideas? (thanks for your continued help on this)