Hi Guys,

Continuing with our migration efforts, we're now going to migrate the last 
running service
on orion which is the mail server and all the software related to it.

This is also getting migrated to a VPS [0]. We plan on making this as 
transparent as possible,
so all the mailboxes, sieve filters and .forward files and anything else mail 
related will be
copied from the home directions each user has on orion. We also plan on syncing 
/etc/shadow, to
make sure all the passwords remain the same.

However, the SSH Host keys will also be changed on the process. These keys will 
be documented
beforehand on [1] as well as sent to this thread. SSH access will only be used 
for password changing
and for putting/editing .forward files and/or sieve filters. Eventually the 
mail server will not support
SSH access anymore, as we plan on transitioning authentication to keycloak in 
the future. But for foreseeable
future, things won't change.

Also, with this change, since mail is the last thing on orion, that machine 
will be decommissioned. So,
please, everyone make sure that you don't have anything on your home directory 
that you wish to keep. We'll
take a backup, but the only things getting moved to the new mail server are 
mail related files.

There's no date yet for both the migration and for orion's decommissioning, but 
the mail migration will happen
next week, and orion's decommission following that and provided the mail 
migration is successful.

There will be a period of time where the pop and imap services will be 
unavailable, as well as sending emails.
We plan on not disrupting the incoming of emails, and I'll sync the queue 
between the machines, to avoid any
lost email, while the DNS records are changing.

Regards,
Giancarlo Razzolini

[0] https://gitlab.archlinux.org/archlinux/infrastructure/-/issues/92
[1] 
https://gitlab.archlinux.org/archlinux/infrastructure/-/blob/master/docs/ssh-hostkeys.txt

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