You may receive a validation error when entering or configuring email addresses that contain special characters.

Valid special characters for contact types are defined by Regular Expressions in the Contact type categories Option Set. 

Edit Option Set Values

To configure the expression that defines what special characters are valid for email addresses, follow the steps below. Only users with admin permissions can configure this.

1. Browse to System Administration > Data > Option Sets.
2. Filter the Name column or scroll down to the Contact type categories Option Set and open it.
3. Click on the Manage Values nav bar to open the Option Set Values blade.
4. In the email row, edit the regular expression in the Meaning Code column to include the characters you need to pass validation. For example, add the “ú” and “ñ” characters to make the email address shown above valid: ^[a-zA-Z0-9úñ.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$
   
   

   Note that regular expressions are beyond the scope of this knowledge base, and you should search the internet for more information on them.

    
5. After editing, click Save in the top-right, and then recycle the modeller cache in from the bottom-left. This will update the validation and use your new regular expression.

Summary

Edit the Contact type categories Option Set to allow contact details to pass validation for addresses that contain special characters.