[Web-cyradm] Re: HOW TO: Rejecting Unknown Local Recipients ??

[Maurice Poisson Adriasola]

In article <fc.00663ffe004eac5600663ffe004eac56.4eac60 at omitech.it>,
 "Andrea Molon" <andrea.molon at omitech.it> wrote:

> Right now we are using greylisting / spamassasin / antivirus and so on, but, 
> now spammer are gentting really more "smart":
> if a spammer use a real SMTP bypass the greylist, and if the mail is well 
> formatted it may by-pass also the spamassasin.
> It's quite normal, but the point is, if a large number of email are send to a 
> non existing user these email are processed and only at the end a mail form 
> MAILER DEAMON is send for a not existing
> user... so a lot of mail, more than 2500 in some server a day, are 
> processed... and in some case the queue is really overloaded.
> 
> 
> In my opinion the only solution is to use a “Rejecting Unknown Local 
> Recipients” policy, I'm trying but is not simple.

I would try 

# .../main.cf
virtual_alias_maps = hash:/etc/postfix/virtual
local_recipient_maps = proxy:unix:passwd.byname $alias_maps 
mysql:/etc/postfix/mysql-virtual.cf

Last is one line that wrapped around.

You shouldn't need the mysql-local_recipient_map.cf file.