Basic facts mail migration
CT will migrate you mail folders to a new mail IMAP/POP server and inform about the procedure and timing.
What you have to yourself depends on how exactly you use the mail server at Nikhef.
Here are the basic facts of the mail migration.
If you forward your mail ...
... you have received an e-mail with the instruction how to reconfigure your forward (before mail migration).
If you use Linux
procmail to process your mail ...
... you may follow these instructions how to redefine the filter rules for your mail delivery (after migration).
If you use a mail client like Thunderbird, MS Outlook, MacOS Mail, etc...
... you have to change the IMAP or POP mail server name from imap to imaps or pop3 to pop3s (details).
If you use webmail as mail client...
... as ever, follow the link on the Nikhef web page and login (get used to the new look and feel).