Do not upgrade to ClamAV v0.90

Don’t be tempted to upgrade to ClamAV v0.90 if you are running MailScanner. The Mail::ClamAV perl module is incompatible with it at this time, so you will have to stick with ClamAV v0.87 (why can’t they develop these things to be backwards compatible?). Hopefully the Mail::ClamAV developer will fix this soon. If you must use v0.90 then you’ll have to set virus scanners = clamav in MailScanner.conf