Issues after password change

Hi

We have a user that has changed their password in Zimbra and on their iPhone. The user can login to Zimbra fine but cannot send emails as it says the username/password is incorrect.

We have removed the account, rebooted the phone and tried to setup the account again but it won't verify the account details. I tried this user account on my iPhone incase it was an issue with the users iPhone but have the same issue with this users account.

I have checked in zmobile to make sure it's still not showing and it's not

Can anyone suggest anything here

Thanks

Glenn