<asp:RegularExpressionValidator ValidationGroup="Anagrafica" ID="RegularExpressionValidatorEmail"
                                                    ControlToValidate="TextBoxEmail" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
                                                    ErrorMessage="Indirizzo email immesso non valido" EnableClientScript="true" runat="server" />

/// <summary>
/// Creates the mail message.
/// </summary>
/// <param name="emailBody">The email body.</param>
/// <param name="maTo">The ma to.</param>
/// <param name="maFrom">The ma from.</param>
/// <param name="maBcc">The ma BCC.</param>
/// <param name="attachment">The attachment.</param>
/// <returns></returns>
public static MailMessage CreateMailMessage(string emailBody, string maTo, string maFrom, string maBcc, Attachment attachment)

FUNCTION ShowEmail( lcRecipient,lcSubject,lcBody )
RETURN GoUrl("mailto:" + lcRecipient + ;
             "&Subject=" + STRTRAN(UrlEncode(lcSubject),"+"," ") +;
             "&Body=" + STRTRAN(UrlEncode(lcBody),"+"," "))
 
****************************************************
FUNCTION GoUrl
******************
***    Author: Rick Strahl
***            (c) West Wind Technologies, 1996

/// <summary>
/// Validates the email.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Web.UI.WebControls.ServerValidateEventArgs"/> instance containing the event data.</param>
/// <param name="page">The calling <see cref="System.Web.UI.Page" /> web page.</param>
public void ValidateEmail(object sender, ServerValidateEventArgs e, Page page)
{
    var emailAddress = page.FindControl("emailAddress") as TextBox;
    var firstName = page.FindControl("firstName") as TextBox;

function checkEmail(inputvalue){    
    var pattern=/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;
    if(pattern.test(inputvalue)){         
        return true;   
    }else{   
        return false; 
    }
}

param (
    $fileToImport = $(throw "must have a file to import!")
)
$from = "myemail@domain.com"
$smtpServer = "smtp.server"
$logoName = "d:\path_to_embedded_File\logo.jpg"
 
 
#Import-Csv $fileToImport | 
#    select to, htmlContent, AttachmentFileName |