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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...New user registrations - how to filter out spam email addresses?New user registrations - how to filter out spam email addresses?
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2/18/2019 3:53 PM
 
Rod Weir


Joined: 6/10/2006
Posts: 224
Hi Nukers,

I'm trying to stop website registrations if the user email is from:

gmail
yahoo
hotmail

I'm using the email regular expression:

\w+([-+.]\w+)*@(?!(hotmail|gmail|yahoo))\w+([-.]\w+)*\.\w+([-.]\w+)*

Problem is, it's not case-sensitive, and I cannot see how to make it case sensitive - despite a lot of different combos with the /i tag and others.

Any ideas?
 
New Post
2/19/2019 3:22 AM
 
Tomoyo


Joined: 9/18/2008
Posts: 22
Hi Rod,
Not too sure if you are checking the email via javascript or backend server code but can you do a convert of the email string to lowercase before checking?
I think it's pretty straight forward to do it

for javascript
string.toLowerCase();

C#:
string.ToLower();
 
New Post
2/19/2019 2:19 PM
 
Rod Weir


Joined: 6/10/2006
Posts: 224
Sorry, I wasn't too clear on that. I'm using the built-in RegEx within DNN which is found in Site > Security > Member Accounts > Registration Settings > Email Address Validation
 
New Post
2/19/2019 7:03 PM
 
Tomoyo


Joined: 9/18/2008
Posts: 22
Hi Rod,
If you need to ignore case using Regular expression
try adding (?i) at the front

so your regex would be
(?i)\w+([-+.]\w+)*@(?!(hotmail|gmail|yahoo))\w+([-.]\w+)*\.\w+([-.]\w+)*
 
New Post
2/19/2019 7:47 PM
 
Rod Weir


Joined: 6/10/2006
Posts: 224
Thanks, but that doesn't work. It actually invalidates the rest of the regex so that everything is allowed.
 
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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...New user registrations - how to filter out spam email addresses?New user registrations - how to filter out spam email addresses?


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