On Tue, Mar 08, 2022 at 03:57:50PM +0100, Zsombor B wrote:
> Can you please confirm that postfix creates a file from each and every
> email at least once?
Postfix queue files are in an undocumented internal format, and virus
scanners at the filesystem level are not appropriate for scanning the
Postfix queue.
> I'm asking this because we have to switch to McAfee AV and my plan is to
> use it's on-access-scan feature to scan the emails.
You need to define what you mean by "on-access" more precisely.
> If postfix really creates a file at least once of each email then this
> can be a solution.
Mailbox storage is up to delivery agents. If you use local(8) or
virtual(8) mail is *delivered* to files, ideally one file per message
(i.e. not "mbox" format). Otherwise, whatever the delivery agent does
(some may store messages in a database...)
On Tue, Mar 08, 2022 at 04:11:32PM +0100, Zsombor B wrote:
> There is no dovecot. This is a relay server and there are security
> constraints that must be follow.
On a relay server with no mailbox delivery, Postfix DOES NOT store
RFC5322-style message files. Messages in transite are held in an
internal queue-file format that is not suitable for filesystem A/V
scans.
--
Viktor.
