Our listserver and mailserver are going to be updated to current Debian stable on Wednesday the 22nd of April. The outage window is 0600-0900 UTC, but we hope not to use all of it.
During this time we expect that mail will be delayed, but hopefully not lost or rejected. The mailing list management UI may be unavailable. We recommend that even if it appears to be available, you should defer your list (un)subscriptions until after the outage window. It is possible that if things don't go well, changes made during the outage window might be rolled back. The Xen release downloads (served from downloads.xenproject.org) will also be unavailable during the upgrade. Mail sent via xenbits will be affected, since xenbits sends outgoing mail via mail.xenproject.org. But access to git repositories (xenbits.xenproject.org), and the osstest CI (test-lab.xenproject.org), should be unaffected. Ian.
