Email Validate with exclude

**Randy Webb** · Jul 23 '05, 08:34 PM

Re: Email Validate with exclude

xxnonexnonexx@t ampascanner.inf o wrote:
[color=blue]
> I am looking to do some email validation and many of the scripts I've located
> online are great basic email validators.
>
> They check to see that the email address is something along the lines of
> somethin@a_vali d_host.at_a_valid_tld
>
> Thats great, looking for that, BUT
>
> I then want to EXCLUDE certain domains, ie: webmail hosts, or what ever hosts I
> add to a list.
>
> I want to work this with my basic update form which gets sent via the a CGI
> script form mail item
>
> User fills out form
> clicks submit
> JS checks to see if its a valid email address AND NOT a webmail or other
> excluded hosts address. If so then submits via my normal formmail.pl script.
>
> Any one already invented this?[/color]

And if JS is disabled? Meaning, you should be double checking on the
server anyway. But, you can exclude by host simply by checking for the
indexOf('domain ToAvoid') and if they are in array then you can loop
through the array:

var nonAccepted;
var blockedDomains = new Array('','',''. ......);
bDL = blockedDomains. length;
for (var i=0;i<bDL;i++){
if (domainName == blockedDomains[i]){
alert('Blocked Domain');
nonAccepted = true;
}
}

And then at the end you check nonAccepted and if its true, you return
false to the onsubmit handler and not submit the form.

--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly

**ASM** · Jul 23 '05, 08:34 PM

Re: Email Validate with exclude

xxnonexnonexx@t ampascanner.inf o a ecrit :[color=blue]
>
> I am looking to do some email validation and many of the scripts I've located
> online are great basic email validators.
>
> They check to see that the email address is something along the lines of
> somethin@a_vali d_host.at_a_valid_tld
>
> Thats great, looking for that, BUT
> I want
> User fills out form
> clicks submit
> JS checks to see if its a valid email address AND NOT a webmail or other
> excluded hosts address. If so then submits via my normal formmail.pl script.
>
> Any one already invented this?[/color]

if you have a list of urls or domains you insert it in your JS
and it is not a good idea because anyone can read it

hate_hosts = 'aol.com,xxxnon exnoneexx,tampa scanner';

function submiter() {
var foo = document.myForm .theEmail.value ;
// code you have to verify url
var hate = hate_hosts.spli t(','); // hate_hosts -> becomes new array
var ok=true; // or nothing if 'ok' exists in precedent code
if(ok)
for(var i=0;i<hate.leng th;i++)
if(foo.toString ().indexOf(hate[i])>=0) {
ok=false;
alert('This host "'+hate[i]+'" is not accepted');
}
return ok;
}
</script>
<form name="myForm" action="page.ht m" onsubmit="retur n submiter();">

submiter() must return true or false
so take care that you have to arrange your code to obtain in its end
the right command
[color=blue]
> Thanks in advance![/color]

anyway JS yould only be an help
and the form must be submitted if JS is disabled

--
*************** *************** *************** **********
Stéphane MORIAUX et son vieux Mac
*************** *************** *************** **********

**Stephen Chalmers** · Jul 23 '05, 08:34 PM

Re: Email Validate with exclude

<xxnonexnonexx@ tampascanner.in fo> wrote in message news:gqrba15m77 4hushkl91mnp68c 8j3cise43@4ax.c om...[color=blue]
> I am looking to do some email validation and many of the scripts I've located
> online are great basic email validators.
>
> They check to see that the email address is something along the lines of
> somethin@a_vali d_host.at_a_valid_tld
>
> Thats great, looking for that, BUT
>
> I then want to EXCLUDE certain domains, ie: webmail hosts, or what ever hosts I
> add to a list.
>
> I want to work this with my basic update form which gets sent via the a CGI
> script form mail item
>
> User fills out form
> clicks submit
> JS checks to see if its a valid email address AND NOT a webmail or other
> excluded hosts address. If so then submits via my normal formmail.pl script.
>
> Any one already invented this?
>[/color]

No, but I've made a simple addition to an existing script. It tests the basic address format without searching
for illegal characters, giving a descriptive message of any error. Then it checks for unwanted domains with
any suffix: .fr or co.uk etc, so just add basic names to the list. It picks-up .....@mail.unWa nted.etc. It
will not pick-up yahooLover@anAc ceptedHost.etc or xxx@hotmailHate rs.etc

Having said that, I expect that most typos are undetectable in that they don't break the basic format. Also,
you cannot expect realistically to detect all webmail hosts, and it may not be too tactful to tell a user that
you're not enamoured of his/her email address.

<script type='text/javascript'>

function emTest(emString , showMessage)
{ // S Chalmers 2005

var badHosts=["usa","msn","ho tmail","yahoo", "pointedEar s"];

var emaData=

/\,/, false, "Comma (,) found",
/\s/, false, "Spaces not allowed",
/@/, true, "No @ sign",
/@.*@/, false, "More than one @",
/^@/, false, "Nothing preceding @",
/\.@/, false, "@ preceded by '.'",
/@\./, false, "@ followed by '.'",
/@.+\./, true, "No '.' anywhere after @",
/\.\./, false, "=>..",
/^\./, false, "Cannot start with '.'",
/\.$/, false, "Cannot end with '.'",
/.+\.[a-z]{2,}$/i, true, "Must end with 2 or more letters"
];
var ok=true, dl=emaData.leng th, hl=badHosts.len gth;

emString=emStri ng.replace(/^\s+|\s+$/g,'');

for(var i=0; i<dl && ( emaData[i].test( emString ) ^ !emaData[i+1] ); i+=3)
;

if(i!=dl)
{
ok=false;
if(showMessage)
alert("Error in format of e-mail address:\n\n" + emString + "\n\n" + emaData[i+2]);
}
else
{
for(var j=0; j<badHosts.leng th && !new RegExp("[@.]"+badHosts[j]+"\\.","i").tes t(emString); j++)
;

if(j!=hl)
{
ok=false
if(showMessage)
alert("Excluded mail host [ "+badHosts[j]+" ]");
}
}
return ok;
}

</script>

<FORM onsubmit="retur n false">
<input size="50" type="text" name='ema'><BR>
<input type="button" onclick="emTest (this.form.ema. value, true)" value='TEST'>
</FORM>

--
Stephen Chalmers http://makeashorterlink.com/?H3E82245A

547265617375726 520627572696564 206174204F2E532 E207265663A2054 51323437393134

**xxnonexnonexx@tampascanner.info** · Jul 23 '05, 08:35 PM

Re: Email Validate with exclude

On Wed, 08 Jun 2005 00:20:12 +0200, ASM <stephaneOTEZ_M OImoriaux@wanad oo.fr>
wrote:
[color=blue]
>
>if you have a list of urls or domains you insert it in your JS
>and it is not a good idea because anyone can read it[/color]

Thanks for the script. I work thru several to meet my needs.
[color=blue]
>anyway JS yould only be an help
>and the form must be submitted if JS is disabled[/color]

No or disabled JS sent to a page that states you must enable ..... otherwise
they will not be able to submit the form which is a required part of the
registration.

Thanks again for the input, and to all that replied so far. All very helpful.

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**xxnonexnonexx@tampascanner.info** · Jul 23 '05, 08:35 PM

Re: Email Validate with exclude

On Tue, 07 Jun 2005 17:48:54 -0400, Randy Webb <HikksNotAtHome @aol.com> wrote:
[color=blue]
>And if JS is disabled?[/color]

They will be sent to a page stating NO JS they can not complete the next step.
[color=blue]
> Meaning, you should be double checking on the
>server anyway[/color]

I would LOVE to, but I am stuck with a host who has selected the formmail script
thats allowed, and thats it. No other formmail scripts are allowed. Attempting
to add your own risks termination of the account. I understand the issue with
abuse/hijack SPAM etc., so thats the breaks. Other domains on other hosts have
had their formmail abilities totally removed, scripts for that not allowed, none
provided by host.
[color=blue]
>. But, you can exclude by host simply by checking for the
>indexOf('domai nToAvoid') and if they are in array then you can loop[/color]

Thanks for the info greatly appreciated.

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**xxnonexnonexx@tampascanner.info** · Jul 23 '05, 08:35 PM

Re: Email Validate with exclude

On Wed, 8 Jun 2005 01:56:25 +0100, "Stephen Chalmers" <ignoring@lycos .co.uk>
wrote:[color=blue]
>you cannot expect realistically to detect all webmail hosts, and it may not be too tactful to tell a user that
>you're not enamoured of his/her email address.[/color]

It may not be "too tactful" but this is the name of the game for this situation.
I've asked politely do not submit yahoo, hotmail, gmail etc.. I still get them,
and reject them. Then I get the nasty email, > /dev/null. You can play by the
rules or you will not be allowed to join. One of those rules is that a real
email address must be used not some address at yahoo, hotmail, gmail etc. that
any user can create 50,000 of them at a time.

Thanks for the input and script.

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Email Validate with exclude

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