Re: RegularExpressionValidator and fake email addresses

Hopefully you don't need it for AOL.com addresses -- it verified just
about anything I sent to it.  And I mean *anything*.  I just pounded on
the keyboard with a random collection of letters and numbers and
everything verified as legit.

---
Patrick Steele
http://weblogs.asp.net/psteele


-----Original Message-----
From: Discussion of building .NET applications targeted for the Web
[mailto:[email protected]] On Behalf Of James Hearne
Sent: Friday, May 25, 2007 7:35 AM
To: [email protected]
Subject: Re: [DOTNET-WEB] RegularExpressionValidator and fake email
addresses


Suits me fine.
http://www.emailverify.net/Demo.aspx results:

[email protected] IS valid
[email protected] is NOT valid

Thanks.
/James

On 5/24/07, Efran Cobisi <[email protected]> wrote:
>
> Hello James,
>
> There are many components out there which you can use to test for
> email address correctness and existence. All of them perform a sort of

> check against the smtp server responsible for the provided email
> address, if one exists. Here is a short list of products you could use

> within your ASP.NET projects:
>
> http://www.emailverify.net
> http://www.aspnetmx.com
> http://www.hexillion.com
>
> Personally I would opt for EmailVerify.NET, which is a project I'm
> currently involved in, because it also supports a sort of false
> positive check (used for smtp servers with anti-spam feature turned
> on) and, btw, is cheaper than the other two. Keep in mind, however,
> that in the end there is no a 100% guarantee that an email address
> does actually exist until you send a message and check for a possible
> bounce. And even if you send a message, there is no guarantee a bounce

> will be sent in the event the recipient does not actually exist. So,
> use these components with care.
>
> Hope this helps.
>
> --
> Efran Cobisi
> http://www.cobisi.com
>
> James Hearne wrote:
> > No, this isn't applicable. I don't want to send out any email. I
> > just want to check if the provided email address does exist or not.
> > How can I do that?
> >
> > /James
> >
> > On 5/24/07, Paul van Brenk <[email protected]> wrote:
> >>
> >> Send an email to confirm their subscription.. all addresses that
> >> are
> not
> >> yet confirmed are not valid and deleted after 48 hrs?
> >>
> >> Paul
> >>
> >> -----Original Message-----
> >> From: Discussion of building .NET applications targeted for the Web

> >> [mailto:[email protected]] On Behalf Of James Hearne
> >> Sent: Thursday, May 24, 2007 15:48
> >> To: [email protected]
> >> Subject: [DOTNET-WEB] RegularExpressionValidator and fake email
> >> addresses
> >>
> >> Hi gurus,
> >> in our web site we often receive a lot of feedback from fake email
> >> addresses, like [email protected]; people sign up to our
> >> newsletter using fake addresses too.
> >> Very bad...
> >> In each page used to enter email addresses we have already inserted
> >> a RegularExpressionValidator which works quite well; the problem is
> that
> >> email addresses like the aforementioned one are actually valid
> >> ones!
> >>
> >> Could you point me to the right direction?
> >> Thanks.

===================================
This list is hosted by DevelopMentor®  http://www.develop.com

View archives and manage your subscription(s) at http://discuss.develop.com