On 2020-06-05 06:16, hfh@cndns.com wrote:

How to display emails within 30 days or 60 days in inbox, sent box, etc. For example, in the mail client tool, the user clicks the inbox button and only sees the mail within 30 days. The virtual mailbox plugin will only generate a new mailbox.

roundcube archive by month

IMHO its not a dovecot option

Thunderbird and roundcube can share same archive format

• hfh@cndns.com:

For example, in the mail client tool, the user clicks the inbox button and only sees the mail within 30 days.

You pretty much answered your own question there. The mail user agent (MUA, what you called "mail client tool") is the one responsible for showing only a subset of available messages.

-Ralph