I am honoured to be asked for by name ;-))
OK - there are a lot more experienced Forum members than me, so don't be surprised if my suggestion is contradicted by others. Anyway, let's give it a go and don't hesitate to get back to me if there's a problem. There are so many ways in which an email account can be set up that what I suggest here might not be what you see when you try to fix this.
If you find my suggestion doesn't match with what you see on your iPad try to send back as detailed a description as possible.
Off we go.....
'Settings', 'Mail, Contacts, Calendar', 'Accounts', <select the account you want to modify>, 'Account', 'Outgoing Mail Server', 'SMTP', 'Primary Server', and there you should be able to set your password. You probably want 'Authentication' set to 'Password' too.
OK - as I said - maybe, as you go through this you will find my description above doesn't match what you see; if so, let me and the Forum know in as much detail as possible what you actually see (the detail can be very important) and we'll fix it.
Hope this helps but don't get depressed if it doesn't. Computers were deliberately made complicated to keep guys like me in work...;-)) If they were simple, we'd all be out of a job.