Help with configuration?

[Marc]

> 1. I want to have incoming emails automatically placed in certain
> folders instead of 'Inbox' based on certain criteria. For example, I
> want all emails from PayPal to go into the 'PayPal' folder and all
> emails from the Debian mailing list to go into the 'Debian' folder. Can
> dovecot do this for me and what is the best approach?

sieve rules

> 
> 2. When I delete an email using my user client, it is only 'marked' as
> deleted (Thunderbird places a scored line through it, and a 'T' is added
> to the filename in the Maildir). How can I get dovecot to automatically
> move mail marked 'deleted' to the Trash folder each time?

cron job with dovadm ?

 
> I also want further delete operations on any mail in the 'Trash' folder
> to be permanently deleted.

cron job with dovadm purge?

> 3. I want to hide my client IP address from the headers when submitting
> mail to Dovecot's submissiond, but I can't seem to find any way to
> disable this. I would prefer that recipients only see the server IP
> address, but not the IP address of the mail client which submitted it.

I am using mailfromd on incoming and outgoing servers. You can easily remove headers with that.