[downtime] CS Email Maintenance, Wednesday, September 29, 2021,

Date: Wednesday, September 29, 2021 (05:00-06:00)

Who is affected:
Users of CS Department Email Services

What is happening:
CS Department email services will be momentarily unavailable while critical
updates take place.

Why is it happening:
On September 30, 2021, an important TLS Root CA Certificate (“DST Root X3”)
will expire. This expiration may cause communication disruption for some
older servers, including one server in our email infrastructure. This brief
outage will allow us to update the system to avoid unplanned disruption
after the certificate expiration.

We will post updates to the status page: http://www.csstaff.org
as necessary.

If this work will cause you undue hardship, please contact
csstaff@cs.princeton.edu immediately, so we can discuss options to reduce
any negative impact. Your patience is appreciated.
Sincerely,
CS Staff
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