The solution I found to work quickest and easiest was to edit 
/etc/clamav-unofficial-updates.conf (not at a computer right now, but if memory 
serves me correctly it was named something close to that) and comment out the 3 
lines corresponding to the mbl databases to load.

It was something like:

mbl_dbs: "
mbl.ndb
"

then I just re-ran the clamav-unofficial-updates script as it appears in the 
the cron script under /etc/cron.d/

Then just for the heck of it I ran qmail-clam -s restart

That disables the mbl db and seemed to work for us for the time being. However, 
it would be nice if there was a bit more automation we could build into this 
that would test definitions before applying them and allow for a quick and easy 
"rollback" or auto-failover that could run on its own to prevent such issues 
from occurring and would "rollback" or disable the definitions if certain 
characteristics were met.

Just my two cents.


--Casey James Price 
Operations/Technical Support

Smile Global
800-541-9794
www.smileglobal.com

Sent with Sparrow (http://www.sparrowmailapp.com/?sig)


On Thursday, August 22, 2013 at 8:56 AM, Dan McAllister wrote:

> This is a CLAMAV problem -- one of their vendors (MBL) released a pattern 
> that essentially matches anything with a :// in it -- or any URL.
> It will also almost always match any attachment with a real message.
> 
> The fix is to either wait out CLAMAV (or manually update with a "freshclam 
> start" command); disable CLAMAV scanning (what I did overnight -- it's fixed 
> today [Thurs]); or remove the pattern (beyond my CLAMAV config expertise).
> 
> Dan
> 
> On 8/22/2013 3:40 AM, Linux wrote:
> > Hi All, 
> > I got the bounce back error every time as,
> >  
> > Remote host said: 554 Your email was rejected because it contains the 
> > MBL_349876.UNOFFICIAL virus.
> >  
> > Can anyone suggest me what to do?
> >  
> > Regards,
> >  
> > Vivek Patil
> > system admin
> >  
> > 
> > 
> 
> 
> 
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