tech writes:

There are so many different types of authentication methods and security and administrative details to worry about that sqwebmail can't possibly cope with them in any reasonable way. You'll have to create your own cgi script/code that does exactly what you need, or else post your exact requirements and hope to get lucky with someone else who already has the same (or similar).

For example, do you want new account requests to be authenticated or authorised? Do you need to set up quotas? Do you want to send a welcome message? etc etc.