How to check for existing mail accounts?

[Kevin Miller]

Johnny Stork wrote:
> I have noticed a large increase in the amount of spam coming in to MS
> (latest) running on CentOS 5 and many are coming into non-existent
> email accounts. Is there a check that can be done for the existence
> of an account first, and then if non-existent, block even before any
> scanning is done, let alone processing through MS.
> 
> Thanks for any suggestions that anyone can give

What MTA are you using?  You can run recipeint verification on sendmail
via milters, and I'm sure Postfix has similar functionality...

...Kevin
-- 
Kevin Miller                Registered Linux User No: 307357
CBJ MIS Dept.               Network Systems Admin., Mail Admin.
155 South Seward Street     ph: (907) 586-0242
Juneau, Alaska 99801        fax: (907 586-4500