>> LMTP will send the message only once to cyrus and allow cyrus to deliver the
>> message internally to the list of recipients provided during the LMTP
>> exchange with sendmail. One nice feature that this provides to cyrus is
>> single-message store, where the message is stored in the first recipients
>> mailbox, and the remaining recipients are hardlinked to this message, thus
>> saving space on the server.
> What happens if the first recipient tries to delete and
> expunge this message?
from 'info ln':
---<znip>---
A "hard link" is another name for an existing file; the link and the
original are indistinguishable. Technically speaking, they share the
same inode, and the inode contains all the information about a
file--indeed, it is not incorrect to say that the inode _is_ the file.
---<znip>---
In short - nothing happens for the other recipients.
--
Ørnulf Nielsen
