Are you talking about postfix filters?
Self-Hosted Main
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
For Example
- Service: Dropbox - Alternative: Nextcloud
- Service: Google Reader - Alternative: Tiny Tiny RSS
- Service: Blogger - Alternative: WordPress
We welcome posts that include suggestions for good self-hosted alternatives to popular online services, how they are better, or how they give back control of your data. Also include hints and tips for less technical readers.
Useful Lists
- Awesome-Selfhosted List of Software
- Awesome-Sysadmin List of Software
I think what you are asking for are server side email filters.
The most common implementation is Sieve, which is supported by Dovecot, Cyrus, and Stalwart IMAP servers (and probably others I'm not aware of). There are a variety of clients that support it, including Thunderbird and Roundcube.
This post is an automated archive from a submission made on /r/selfhosted, powered by Fediverser software running on alien.top. Responses to this submission will not be seen by the original author until they claim ownership of their alien.top account. Please consider reaching out to them let them know about this post and help them migrate to Lemmy.
Lemmy users: you are still very much encouraged to participate in the discussion. There are still many other subscribers on [email protected] that can benefit from your contribution and join in the conversation.
Reddit users: you can also join the fediverse right away by getting by visiting https://portal.alien.top. If you are looking for a Reddit alternative made for and by an independent community, check out Fediverser.