If you wish to remove words that you have added to your Personal Dictionary during Spell Checking, you can select the Edit your personal dictionary link.

You may wish to Encrypt your personal dictionary to protect your privacy in the unlikely case that the Webmail system gets compromised and your personal dictionary file gets stolen. When encrypted, the file's contents look garbled and are hard to decrypt without knowing the correct key (which is your mailbox password). If you decide to encrypt your personal dictionary, you must remember that it gets "hashed" with your mailbox password. If you forget your mailbox password and the administrator changes it to a new value, your personal dictionary will become useless and will have to be created anew. However, if you or your system administrator change your mailbox password but you still have the old password at hand, you will be able to enter the old key to re-encrypt the dictionary with the new value.

Note: For the large majority of users, this is not necessary or recommended.