mail.box filled with (expletive deleted)

We run our SMTP on a separate Domino partition.  We have it configured to 
use 4 mailboxes; thus we have a mail1.box, mail2.box, mail3.box and a 
mail4.box.  Each of these has over 1,200 messages stacked up in them.  And 
we clear them out no less than once a week.

Many of the entries in these files will have a from address, and a to 
address that is meaningless to me.  Sample from address:  Eugenie Moorer 
<Jinnyuj@xxxxxx>.  Sample to address:  Jinnyuj@xxxxxxx

We are running Domino 5.0.12 on our 840-23EA iSeries running V5R2 of 
OS/400.

                            Display System Status GDIHQ 
                                                            06/11/03 
09:46:31
% CPU used . . . . . . . :       24.8    System ASP . . . . . . . : 2443 G
% DB capability  . . . . :        6.2    % system ASP used  . . . : 
89.0798
Elapsed time . . . . . . :   00:00:05    Total aux stg  . . . . . : 2443 G
Jobs in system . . . . . :      77661    Current unprotect used . : 23248 
M
% perm addresses . . . . :       .140    Maximum unprotect  . . . : 23657 
M
% temp addresses . . . . :      1.795  
  
Sys      Pool   Reserved    Max  ----DB-----  --Non-DB---  Act-   Wait- 
Act- 
Pool    Size M   Size M     Act  Fault Pages  Fault Pages  Wait   Inel 
Inel 
  1    2373.05    706.19  +++++     .0    .0   19.0  27.3  456.6     .0  
.0
  2    6148.23      4.74    818   23.0 395.7   92.1 468.6  13606     .0  
.0
  3    1685.12       .21    292    8.1  12.4   31.4  53.1  612.3     .0  
.0
  4    4549.26       .01     80    1.2 800.3   13.6  80.4  819.9     .0  
.0
  5     244.31       .00     36     .3   1.2    1.7   2.0  217.9     .0  
.0

In my Server Configuration document we have "Deny messages from the 
following internet hosts to be sent to external internet domains:(* means 
all)" set to *.

In the Server Configuration document, in the "Inbound Connection Controls" 
section there is a field "Verify connecting hostname in DNS".
Would enabling that stop this junk?
Would enabling that stop valid email?

In the Server Configuration document, in the "Inbound Sender Controls" 
section there is a field "Verify Sender's domain in DNS".
Would enabling that stop this junk?
Would enabling that stop valid email?

The problem is this:  I can see valid email in the mailx.box.  However the 
junk is slowing down the process to the point in which the valid email is 
not distributed to the individuals.  I say again, I send mail from my 
yahoo account to my Notes account.  It arrives into the mailx.box and sits 
there.


Rob Berendt
-- 
"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety." 
Benjamin Franklin