There is a much easier and better way to disable the email validation. In the Feedback module Settings, clear the value of the "Email Validation" field. When this field is left empty, the regular expression validator is disabled. If you want to still validate the email but to different regional standards you could also define and enter your own custom regular expression in this field.

Also although I would think that one would want to make the email field a required one in most cases, it is also possible in the module settings to set this field to either "Optional" or "Hidden". If the field is hidden and the user is logged in, his/her email address will be logged and included in the email which the module sends to the specified users or roles.

Although it is often possible to make some minor changes in the .ascx file of a DotNetNuke module control, one cannot remove a tag with an id and runat="server" attributes. To do so without modifying code which references that particular tag or ASP.Net control will cause an error.

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Bill, WESNet Designs
Team Lead - DotNetNuke Gallery Module Project (Not Actively Being Developed)
Extensions Forge Projects . . .
Current: UserExport, ContentDeJour, ePrayer, DNN NewsTicker, By Invitation
Coming Soon: FRBO-For Rent By Owner

You do not need to mofify any of the module's files to disable email validatioin. When logged into the site as admin or host, navigate to the page containing an instance of the Feedback module, hover over the action menu icon to the left of the module title, and select "Settings" from the context menu that will be displayed. In the "Moderation and Feedback Management" section of the Settings page, you will see a caption "Email Validation" followed by a regular expression used to validate email addresses. To disable email validation, you may clear the contents of the validation expression. An empty validation expression will disable email validation.

There is also a section on the Settings page where you can set any of the feedback contact fields to "Required", "Hidden" or "Optional". If the Email field is set to "Optional", the user may but is not required to fill in the field on the Feedback form. In otherwords, the email field's required field validator is disabled.

Since you have deleted some of the module's localization information (resx files) and modified the module's controls, I would suggest that you first uninstall the module (from Host --> Extensions), reinstall the module, add a test instance of the module back on your page, then try these suggestions.

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Bill, WESNet Designs
Team Lead - DotNetNuke Gallery Module Project (Not Actively Being Developed)
Extensions Forge Projects . . .
Current: UserExport, ContentDeJour, ePrayer, DNN NewsTicker, By Invitation
Coming Soon: FRBO-For Rent By Owner