How to check for existing mail accounts?

[Johnny Stork]

its sendmail

Kevin Miller wrote:
> 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
>