Tomorrow we will migrate the mail server starting at Saturday the 24th
October (tomorrow) on 12:00 GMT. The migration should take around four
hours, but could take longer.
This migration affects everything which sends email, so not only your
@archlinux.org address but also the bbs, AUR, etc.
The reason is why we migrate the mail server, the current server costs
us ~ 40-60 euro / month (dedicated server) and we will be moving to a
VPS which is around ~ 3 euro / month.