The IsEmailBlocked( ) function

function SendEmail ( sFromEmail, sToEmail, sBccEmail, sSubject, sBody ) {    if ( IsEmailBlocked ( sToEmail ) )       return;

This tests the email address and doesn't send the email if it fails.

The IsEmailBlocked function, also in utils/Email.asp, is very simple. Today, with a single blocked email in the list, I don't even use a database, opting instead to keep the list of blocked emails in a global variable, sBlockedEmails.

// ============================================ // check that email hasn't been blocked to this address. send all data // to webmaster (and optionally to blocked sender) if it has. // ============================================ function IsEmailBlocked ( sEmail ) {    // make lowercase for the comparison    var sTest = '>' + sEmail.toLowerCase ( ) + '<';    if ( -1 != sBlockedEmails.indexOf ( sTest ) )    {

The email addresses are converted to lowercase characters and wrapped in >< to ensure that only the correct matches are found. If a match is found a new email is sent ot me, and the function returns true.

// this email is blocked, so send me an email    var sBody = 'Someone has attempted to cause email to be sent to the email address "' + sEmail + '". As requested, the CoverYourASP site has blocked access to this email address. Below is all the information I could gather about the perpetrator:\n\n';    sBody += 'HTTP_USER_AGENT: ' +Request.ServerVariables ( 'HTTP_USER_AGENT' ) + '\n';    sBody += 'REMOTE_ADDR: ' +Request.ServerVariables ( 'REMOTE_ADDR' ) + '\n';    sBody += 'SERVER TIME:' + new Date + '\n\n';    sBody += 'If you have any questions about this email, or wish to stop receiving these notices of attempted abuse, please reply to this email.\n\nMember Services\nhttp://' + sHostDomain;    SendEmail ( 'MemberServices@' + sHostDomain, 'Abuse@' + sHostDomain, '', 'Email blocked', sBody )    return true; }