Not a filter’s. The message means that sendmail told a filter that all data associated with this message can be освобождены and the message processing was terminated. The filter does not known who interrupted processing – a client or sendmail itself.
{sendmail}/libmilter/docs/xxfi_abort.html
...
xxfi_abort is only called if the message is aborted OUTSIDE the
filter's control and the filter has not completed its
message-oriented processing. ...
Hint: It is also likely that
Norton Personal Firewall or Norton Information Security (NIS) s installed on the client’s computer which opens each mail session with empty message not accepted by sendmail.
Question: yesterday, just for curiosity, I have disabled drweb on MTA.
The outcome is depressing: not a single «aborted» message up till now!
It is quite natural, as this diagnostics is in the filter.
«...is aborted» if written by the filter when sendmail instructed the filter to terminate processing (due to disconnection, for example, соединения).
View the logs immediately before «...is aborted» and you will see the true reason for yourself.
