Maildrop
Maildrop is a mail delivery agent (MDA) and mail filter that processes incoming email messages on Unix-like systems. It is designed to filter and sort emails based on user-defined rules, often used in conjunction with mail transfer agents (MTAs) like Postfix or Exim. It can deliver mail to mailboxes, forward messages, or execute scripts based on filtering criteria.
Developers should learn Maildrop when building or maintaining email systems that require advanced filtering, such as spam control, automated sorting into folders, or integration with custom applications. It is particularly useful in server environments where email processing needs to be automated and configurable through scripts, offering a lightweight alternative to more complex mail filtering solutions.