using System.ComponentModel.DataAnnotations; namespace Bit.Core.Utilities; public class StrictEmailAddressAttribute : ValidationAttribute { public StrictEmailAddressAttribute() : base("The {0} field is not a supported e-mail address format.") { } public override bool IsValid(object value) { var emailAddress = value?.ToString() ?? string.Empty; return emailAddress.IsValidEmail() && new EmailAddressAttribute().IsValid(emailAddress); } }