saguaros Thanks for the speed of your response. We have now tried the default contact form and that worked absolutely fine, a message was displayed and the e-mail was received. However, we have tried to use JA Quick Contact again after uninstalling it and then re-installing it and it still does not work. We have also tried clearing the site's expired cache, deleting the JA Quick Contact module, removing it from the trashed modules and creating a new JA Quick Contact module. We have other websites that use JA Quick Contact and they are working (including one site that has the same 2.6.5 version installed).