Over the weekend I found that many mail was not being delivered. Nothing had changed my end, so this was all a bit confusing. Mail coming in was fine, but ,mail going out was blocked.
I eventually found out that I was getting:
Recipient address rejected: [L9] your ip 18.104.22.168 is listed on too many RBLs
Is this BTInternet being blocked because it is sending spam?
Any suggestions as to what to do now?