Backups directly to S3, problem with space when more than 50% is full.

[godlesowned]

Summary

Example:
Server is 70% full, it can't create backup file and then move to S3 because there will be no free disc space.

Motivation

Free disk space of our servers.

Additional context

No response

[czssf]

S3 backup needs to be cached locally and then uploaded to the bucket in parts, you can't backup if you local disk is not enough space.

[dragoangel]

As @czssf said. Plus backups is something not regulated by mailcow, if you do not like default backup script, no problem, do it in another way.