[Dovecot] Maildir filename extensions S=<size> and W=<vsize>

[Tamsy]

mailing at securitylabs.it wrote the following on 25/10/2010 15:27:
> On 25/10/2010 10:00, Ralf Hildebrandt wrote:
>> I'd like to add S=<size>  and W=<vsize>  to the filenames in my Maildir
>> storage for newly delivered mails. But I cannot find where I can make
>> Dovecot's LDA add those. Anybody?
>>
>> http://wiki2.dovecot.org/MailboxFormat/Maildir says:
>>
>> A maildir filename with those fields would look something like: 
>> 1035478339.27041_118.foo.org,S=1000,W=1030:2,S
>> which is exactly what I want, but it doesn't tell me how!
>>
> Hello, I think it's by default. My delivery command in exim is:
>
> command = /usr/local/libexec/dovecot/deliver -d $local_part@$domain -f 
> $sender_address -a $original_local_part@$original_domain
>
> and size and vsize are present.

Hello,

it should be like that by default. On a newly installed Dovecot 2 (LDA) 
with Postfix 2.7 and Maildir it reads on my box:

1287917936.M244862P10492.foo.net,S=11693,W=11922:2,Sa