Help with configuration?

[Ellie McNeill]

Hi, I'm running my own mail server on Debian 11 with exim and Dovecot 
2.3.13. I have it working, but I'm seeking advice on further customising 
my setup. I'm using the Maildir++ format with some personal folders. I 
use IMAP to retrieve mail and Dovecot's submission server to send mail.

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?

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?

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

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.

Regards,
Ellie

PS - When signing up for the mailing list, there was no selection 
ability on the question "Would you like to get replies to your mails 
only to the list, ie. add a Reply-To header?"