sometime I receive a message whit from: (null) to: (null) sbj: (null) and a body whit some spam, loocking at the header sais nothing but "non MIME compliant mailer" what is a mailer not MIME compliant and how can it send mails if it is not "standard" ? is there a way to avoid this type of spam ? PMMail cannot filter (null)... or can it ? any hint appreciated, TIA Mauro