spmfilter is a mail filtering framework. It attempts to be a general filtering framework for any purpose. The API enables spmfilter plugins to access messages as they are being processed by the MTA. This allows them to examine and modify message content and meta-information during the SMTP transaction. Plugins are loaded at runtime and can be processed in any sequence. The processing chain can also be altered by a single plugin, for example if the plugin has to stop further processing.
The Aspose.Email for Android API enables developers to design Android applications for managing and manipulating Outlook email file formats without using MS Outlook. It provides tools to create, read, and convert the Outlook MSG, PST, EML, EMLX, OST, and MHT file formats. It manages recipients, subjects, message bodies, and attachments in MSG documents. It creates and save appointments in draft format, extracts and saves calendar items from a PST, and adds Mapi Items such as Messages, Contacts, Notes, Journals, and Tasks to a PST. It also lets you manipulate message attachments with just a few lines of code.