On Sat, 2008-11-01 at 11:30 -0400, Micah Anderson wrote: > Joseph Brennan <[EMAIL PROTECTED]> writes:
> > Do you mean attempts to get your users to send their passwords, > > or fake mail pretending to be from banks? > > I mean attempts to get my users to send their passwords, are these not > called phishing? An important bit of information, missing from the OP. :) Targeted attacks at your users, so the general phishing BLs don't really apply. Anyway, can't you educate your users, that (a) Any administrative email will be sent from an official, well known, internal address? That means *not* an arbitrary address. Yes, sorry, the obvious... (b) They will *never* ever be asked for a password by mail. Period. Again, obvious... Then block internal / administrative From addresses coming from any external SMTP. This is not a technical way to stopping these, but an educational approach to prevent the most dumb and gross social engineering. At least the second one actually should be well-known, and I've seen ISPs pointing it out frequently... guenther -- char *t="[EMAIL PROTECTED]"; main(){ char h,m=h=*t++,*x=t+2*h,c,i,l=*x,s=0; for (i=0;i<l;i++){ i%8? c<<=1: (c=*++x); c&128 && (s+=h); if (!(h>>=1)||!t[s+h]){ putchar(t[s]);h=m;s=0; }}}