Category Archives: SPAM

Email Filtering on UKFSN

Some time ago the email filtering service at UKFSN ran into serious problems and I had no choice but to disable it until I could completely rebuild the filtering platform. This resulted in all UKFSN email customers – and me! … Continue reading

Posted in Email, SPAM

You are a spammer and you don’t even know it!

Over the past several months I have been seeing an increase in the number of customer accounts being abused to relay spam via our server. In each case the customer account credentials have been used to authenticate to our SMTP … Continue reading

Posted in Email, SPAM

Preventing SMTP Auth abuse

One of the biggest problems I have had to deal with over the past few years has been abuse of authenticated SMTP. Spammers occasionally manage to obtain a customer’s username and password and use these to send email via our … Continue reading

Posted in Code, Email, Perl, Postfix, SPAM