If your list does not have an Attachments= line in its
headers, all attachments are allowed. The same is true if it has
It's unlikely the ability to post any type of attachment
is what you really need. You might not need the ability to post attachments at all.
Attachments= No disallows any but plain-text attachments.
This is the safest setting.
Attachments= No,Filter accepts messages with any type of attachment,
but filters out the attachment itself. There may be situations where
this is useful.
Attachments= <filter based on MIME Content Type>
MIME content types are visible only in the full headers of an email
message, and look something like this: Content-Type: TEXT/PLAIN; charset=US-ASCII Here are some tested filters to allow certain types of attachments:
use as many or few as you need.