Email Validation 1

[hc1619]

I'm wanting to do some thorough validation on the email address people use to sign up with on my site.

I'm not using cfinput (and dont want to).. so I need a solid RE script to do this for me.

At the moment all I'm using is this: ReFind(".+@.+..+", form.emailAddress).

But i'd like to use something that disallows people from entering in illegal characters.. something that will check all syntax and characters.

Anyone know of anything I can use?

thanks.

 

[ecobb]

I use a custom tag called CF_EmailVerify. It works pretty well, you can get it here from the Macromedia Exchange.

Here's another one that I found that you may be interested in. CF_IsEmail




Hope This Helps!

Ecobb

"My work is a game, a very serious game." - M.C. Escher

 

[Sarky78]

In terms of Regular expressions we use this from time to time:

<CFSET email_re = "^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$">

which seems to work quite well.

But when we want to know for sure if the email exists we use the email verifier from cfdev

http://www.cfdev.com/email/verify/

Hope this helps!

Tony

 

[joepeacock]

This is the custom tag I use. It doesn't verify TLDs or anything, but it checks for proper structure.

<cfset email = attributes.email>
 
<CFSET AtsignPos = 0>
<CFSET PeriodPos = 0>
<CFSET SpacePos = 0>
<CFSET Length = Len(Email)>
<CFLOOP INDEX = "LoopCount" FROM = "1" TO = "#Length#">
 <CFSET Pos = LoopCount>
 <CFSET SingleChar = Mid(Email, Pos, 1)>
 <CFIF SingleChar IS Chr(64)>
  <CFSET AtsignPos = Pos>
 <CFELSEIF SingleChar IS Chr(46)>
  <CFSET PeriodPos = Pos>
 <CFELSEIF SingleChar IS Chr(32)>
  <CFSET SpacePos = Pos>
 </CFIF>
</CFLOOP>

<cfif spacepos is not 0>
 <cfset verifyemailaddr = 0>
<cfelseif atsignpos GT periodpos>
 <cfset verifyemailaddr = 0>
<cfelseif (length - periodpos) LT 2>
 <cfset verifyemailaddr = 0>
<cfelseif (periodpos - atsignpos) LTE 2>
 <cfset verifyemailaddr = 0>
<cfelseif atsignpos LT 3>
 <cfset verifyemailaddr = 0>
<CFELSE>
 <CFSET VerifyEmailAddr = -1>
</CFIF>

<cfif verifyemailaddr is 0>
 <cfset caller.emailok = "no">
<cfelse>
 <cfset caller.emailok = "yes">
</cfif>

Just save it as checkemail.cfm and use it like this:

<cf_checkemail email="#form.custemail#">
<cfif emailok is "yes">
 ...
<cfelse>
 ...
</cfif>

 

[webmigit]

If you're serious about it, I'd suggest you go with arperry's.. It looks pretty good..

For the record, this is what I used for a while.. It was pretty basic but eh..

<cfif listlen(email,"@" eq 2 and listlen(listlast(email,"@"),".") gt 1 and len(trim(email)) gte 6>...</cfif>

I generally tossed in a mild regex to filter out slashes and such.. but I use that on sites where I'm not very serious about what the user entered..

ALFII.com

http://www.alfii.com

---------------------
If this post answered or helped to answer your question, please reply with such so that forum members with a similar question will know to use this advice.

 

[webmigit]

<cfif listlen(email,"@"[b])[/b] eq 2 and listlen(listlast(email,"@"),".") gt 1 and len(trim(email)) gte 6>...</cfif>

Oh, for the ability to edit posts...

ALFII.com

http://www.alfii.com

---------------------
If this post answered or helped to answer your question, please reply with such so that forum members with a similar question will know to use this advice.

 

[Shelgas]

This works really well for me in a similar situation.

<cfif REFindNoCase("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.(([a-z]{2,3})|(aero|coop|info|museum|name))$", #form.email#) neq 1 >
Please enter a valid email address.<br>
<a href="javascript:window.close()">Close Window</a>
</cfif>