dovecot - Oct 2019 - dovecot disk space settings

Hi,

is there an option to leave some disk space free?
Let's say, don't store new mails if the storage mount point has less
than 1% free disk space.
What's the way to go?

I don't want to restrict each mailbox size. It's just to prevent running
out space completely.

Thanks!

Best regards,

Marcel

> I don't want to restrict each mailbox size. It's just to prevent 
running out space completely.

Why? (If I may ask)

> 
> is there an option to leave some disk space free?
> Let's say, don't store new mails if the storage mount point has
less
> than 1% free disk space.
> What's the way to go?
> 
> I don't want to restrict each mailbox size. It's just to prevent
running
> out space completely.
emails are often accepted by an mta like postfix before handed over to dovecot.
You could configure a postfix policy service that checks your disk usage and
temporarily rejects new emails.

On the server you should check your filesystem: ext4 reserves 5% of storage
for root by default. If dovecot does not need root to deliver mails, you already
might have some space left.

Or you might use linux system quota. If all your mailusers are in the same group
you can set a group quota.

Another alternative would be to create a big dummy file that you can delete
if necessary. E.g. truncate -s 20g /var/mail/DELETEME   (man truncate)

Best regards
Gerald

marcel bendler via dovecot skrev den 2019-10-22 10:52:
> I don't want to restrict each mailbox size. It's just to prevent 
> running
> out space completely.
dovecot quotas policy server can limit out of space problems, the trick 
is to not allow more then storages can hold, if this test is done in 
postfix its only for postfix queue dir, not neseserly same partion that 
dovecot use to storage, but postfix can call dovecot policy service to 
check its not out of space, the dovecot policy service can still be 
optimised for this propose