For now, attachments API is really limited. You can only list them when reading emails and download all of them.

#email-lib

• Think about a criteria API for filtering attachment by size, name, mime type etc.
• Add ability to search for attachments matching the given criteria.

#himalaya

• Add command to search for attachments matching the given criteria and to display them in a table.
• Add command to download attachments matching the given criteria.
• Add --attachment option to commands tpl {new,reply,forward} to automatically add attachment as <#part …> to the generated template.

#himalaya-emacs

• Add view to search for attachments matching the given criteria and to display them in a table.
• Add keybinds to preview and to download selected attachments.

#himalaya-vim

• Add view to search for attachments matching the given criteria and to display them in a table.
• Add keybinds to preview and to download selected attachments.