vb.org Archive - Anti-Spam Options - Automatically deny registration for users with multi-dotted email address

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- - Anti-Spam Options - Automatically deny registration for users with multi-dotted email address (https://vborg.vbsupport.ru/showthread.php?t=283540)

cloferba

05-26-2012 10:00 PM

Automatically deny registration for users with multi-dotted email address

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On my forum many bots have multi-dotted email address so I wanted to avoid them to create a new account on my forum.

The way to do this is create a new plugin to recognize these multi-dotted email address provided at time of registration and delete them automatically.

Steps:

Create a new plugin using hook userdata_start

Use this code:

Code:

$this->validfields['email'][VF_CODE] = '

    $max_dots = 1;

    if ($retval = $dm->verify_useremail($data))

    {

        $parts = explode("@", $data);

        if (is_array($parts) && substr_count($parts[0], ".") > $max_dots)

        {

            $dm->error("bademail");

            $retval = false;

        }

    }

    return $retval;

';

It only checks the part before the '@', so set $max_dots to the number of dots you will allow (I think one dot in an email name probably isn't unusual, but that's up to you). Also, this uses the default 'bademail' phrase, but if you'd rather have a special error messages for "too many dots" you can create a phrase and use the varname in place of 'bademail'.

Special thanks to kh99 who provided this solution.

copjend

05-27-2012 07:09 PM

Many thank

Boofo

05-27-2012 07:15 PM

If you use email verification, that should catch the phony email addresses so they wouldn't be able to register, anyway. ;)

Snowhog

05-27-2012 07:36 PM

This plugin (not a MOD) was suggested to me based on my post that was answered by kh99 at https://vborg.vbsupport.ru/showpost....12&postcount=3

It doesn't delete registrants with multi-dotted emails, it merely prevents them from actually registering.

djbaxter

05-27-2012 07:49 PM

This is a good idea.

To prevent brain strain, can you easily tell me how to also check for semicolons or colons before the @? For a while I was getting Chinese bots with email address like gobbledygoop;more_gobbledygoop@somesite.com

Snowhog

05-27-2012 08:43 PM

You could write two additional plugins (give each a unique plugin name) using the code with only a slight modification.

Plugin to deny registration if email address contains any colons preceding the @

Code:

$this->validfields['email'][VF_CODE] = '

    $max_colons = 0;

    if ($retval = $dm->verify_useremail($data))

    {

        $parts = explode("@", $data);

        if (is_array($parts) && substr_count($parts[0], ":") > $max_colons)

        {

            $dm->error("bademail");

            $retval = false;

        }

    }

    return $retval;

';

Plugin to deny registration if email address contains any semicolons preceding the @

Code:

$this->validfields['email'][VF_CODE] = '

    $max_semicolons = 0;

    if ($retval = $dm->verify_useremail($data))

    {

        $parts = explode("@", $data);

        if (is_array($parts) && substr_count($parts[0], ";") > $max_semicolons)

        {

            $dm->error("bademail");

            $retval = false;

        }

    }

    return $retval;

';

I'm sure that these could be incorporated into the original plugin, but I'm not a coder, so maybe kh99 can suggest how to do that.

Boofo

05-27-2012 08:52 PM

You should be able to do a preg_match to cover all of them in a single piece of code.

djbaxter

05-27-2012 09:53 PM

Thanks. I'll play around with this a bit and see if I can make it one if a or b or c statement.

Boofo

05-27-2012 10:26 PM

Maybe make it a setting where you can add what to exclude. ;)

djbaxter

05-27-2012 10:37 PM

That's probably a bit beyond my vBulletin skills.

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