Am 21.08.24 um 20:27 schrieb Evgeniy Berdnikov via Exim-users:
> On Wed, Aug 21, 2024 at 12:55:37PM -0300, Ronaldo Luiz via Exim-users wrote:
>> Hi Sirs,
>>
>> I need a help to install on my Linux Server an Archive Email software management.
>>
>> Exim send around 15.000 billing e-mails each month, receive around 200.000/month and need to archive the 5 last years emails.
>>
>> Which is the best software option?
> Question "What's the best?" implies some criteria for comparison,
> but you did not mention anything.
>
> To store relaying mail to a disk one can use Exim with redirect router,
> which have "unseen" option and feed message copy to "appendfile" transport.
> This is purely Exim solution, without any external software.
That is not the best way to do it, as each mail needs a sha256 checksum
generated, so the archiver can testify, that the archived email is
untampered.
With a mbox file, you would need to sign this growing pile of data each
time a message is appended, which will overpower your server in a few weeks.
Storing the messages in the default maildir format, allows to sign each
message separately without causing hassle to the system.
- it's easier to maintain
- easier to delete old messages
- needs less power
but increases the accesstime to the directory with 200k mails per month,
which suggests to store it in seperate directories
/var/mail/user/<YEAR>/<MONTH>/
heres the router, you can use a different "target"(data) if you like:
begin routers
archiver:
driver = redirect
data = mail-archiv@???
pipe_transport = address_pipe
unseen
... normal routers ...
best regards,
Cyborg
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