Milter-greylist

According to manu@...:
> 
> We could also check lengths: number of lines (lines keyword), number of
> bytes (length keyword):
> dacl blacklist lines 4000- msg "no more than 4000 lines"
> 
> Proposed syntax for lines and length values:
> 2000            exactly 2000 
> 2000-4000       between 2000 and 4000
> 4000-2000       Undefined behavior

issue a warning (syslog) at compile time then swap and use like
the previous one.

> 2000-           More than 2000
> -4000           Less than 4000

not sure that this "lines" command is useful though as people often use
confMAX_MESSAGE_SIZE directly in sendmail.mc when the goal is to reject
huge emails. When it comes to spam, it's not that big (the biggest being those
with animated GIFs, maybe 60k top) and impossible to differenciate from
legit emails.

BTW, in case some wonders, I use fuzzyocr for those spam pics:
http://fuzzyocr.own-hero.net/

/Fabien