A client recently had the problem of the error message"User Dictionary too large" appearing every time they tried to send an e-mail which cancels spellcheck. Below is a way to correct this problem.
* Go to the GoldMine root directory
* Open the dict.u with the notepad
* Remove some words from the list and save and your problem should be eliminated
Note: If you are unsure of where the GoldMine root directory is located or you are not familiar with opening files using notepad, etc. please solicit help from your IT person/department