Please can anyone help me - I am trying to establish whether there are any reserved symbols in SQL passwords

eg % £ " $ ( / < * etc

The SQL BOL has a list of reserved words but I cannot find a list of reserved symbols.

We have a problem where by for example if the main part of the password is "test" and my user wants to add a punctuation mark into this we get "You are attempting to use an invalid character message"

Specifically

"test$" is accepted "$test" is not accepted
None of "te+st" "+test" "test+" are accepted.

Has anyone else come across this and found a list of the logic that produces these results so I can point my users in the right direction?

Cheers