email-validation

check if e-mail is valid and exists

Hello, i want to check if an e-mail address is valid and exist. I mean not using regex. I need a valitadion by using mx. for example how to check blablabla[at]gmail.com exists on gmail.com it would be better using CMD (win) ...

Handling typos in emails or signing up users ?

I have a web app at which visitors are signing up and getting a newsletter to the email they registered with. I am using only a single email field in the signup form, since I wish to reduce the number of fields plus I figure most people (like me) copy and paste the email which mean a typo would propagate to the secondary verification fi...

Checking for valid email address on the IPhone

I am developing an iPhone application where I need the user to give his email address at login. What is the best way to check if an email address is a valid email address? ...

How to use php function to report form abuse.

I have a contact form on my website, and everything works like a charm. I am using a anti-injection validation script, that I suspect is supposed to send a notification when somebody attempts to use header injection. I have tested this thouroghly and cannot determine why it will not notify me on the event of an abuse. The script is below...

SMTP Validation of E-Mail Address

I'm working on a project which requires me to know with extremely high probability the availability of an e-mail account on a mail server (let's use Hotmail in this example.) I know that the VRFY command is often ignored (Hotmail says "I'll take a message" or something of the like when I try it,) so I'd like to know the best way to go ab...

SPF record for a shared web-hosted domain

From the definition of SPF, SPF only authorizes IP address. For one of our domain name, we have created an SPF record to allow only A and MX IPs as genuine sender. This domain is hosted in a shared-hosting environment along with many other customers. In such setup, owners of other domains on same host can spoof my emails easily. Is the...

Confirmation link Email in JSF

How do you make a link which you can email to users to confirm their email address is clicked in JSF? i.e. once they click on the link their account will be activated. ...

Common practice with validating emails?

I read an article the other day that briefly touched base on some common validation flaws in most modern websites, and I decided to do some research on it. Turns out, MOST websites, and email providers (hotmail, yahoo) are being TOO STRICT with their validation. - In section 2.3.10 of RFC 2821 Consequently, and due to a long hist...

Creating files in a *nix environment with an email address as its name

PLEASE don't tell me why you think its a bad idea. Just tell me if its a workable idea. I want to create files in a folder with names like the following: [email protected] [email protected] [email protected] Is there some fundamental incompatibility in the characters allowed in email addresses and those allowed by a unix syst...

check for valid email address

Possible Duplicate: What is the best regular expression for validating email addresses? hello, can you help with my coding? my problem is this: when the user wants to register, and when he entered his email. how can i check if it is valid or not? i use this code. please help me. tell me if its correct because i'm only a ...

Regular expression which matches a pattern, or is an empty string

I have the following Regular Expression which matches an email address format: ^[\w\.\-]+@([\w\-]+\.)+[a-zA-Z]+$ This is used for validation with a form using javascript. However, this is an optional field. Therefore how can I change this regex to match an email address format, or an empty string? From my limited regex knowledge, I t...

E-mail verification through e-mail & PHP?

I have seen on some sites where the user can simply send a blank e-mail to something like [email protected] to have their e-mail verified if they are having trouble getting the verification e-mail. I have a website with PHP/MySQL that I'd like to implement this same functionality, but I haven't done much with e-mail besides sending it s...

How can I catch the following obfuscated email addresses in PHP?

Consider the following script that contains obfuscated email addresses, and a function that attempts to replace them based with ***** by using regex pattern matching. My script attempts to catch the words: "at", "a t", "a.t", "@" followed by some text (any domain name), followed by "dot" "." "d.o.t", followed by a TLD. Input: $str[] = ...

Why does filter_var($email, FILTER_VALIDATE_EMAIL) allow test@test?

I was just setting up the validation for a form in which I decided to try using the filter_var function to check the validity of my email address. I can not find out what filter_var actually allows anywhere though (since the documentation is very simple), and I found out that it is allowing an email address like test@test. Doesn't there ...

Using jQuery to check for regular expressions

Hi all, I know there's the jQuery validation plugin. But I don't need something that extensive. All I want to do is have jQuery check a name text box: <input type="text" name="name" id="name" /> To make sure that it has at least 2 characters AND I want jQuery to check a phone text box (identical to the name text box, name="phone" ...

validate.cfc Regular expression help for email

I'm using the excellent validate CFC by Ryan J. Heldt http://validation.riaforge.org/ but have a problem with the email validation RE. RFC 5322 allows the following characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~ however the RE in validate.cfc rejects JohnO'[email protected] because of the apostrophe. The RE in question is in ...

Is it a bad idea to automatically log users in from an email?

For many of the sites we develop, we verify the user's email address. Typically the workflow is such: User registers for site (activation email is sent with link to activate) User verifies email address (by clicking aforementioned link) User must log in to site in order to use it (assuming they weren't already logged in) Clients ofte...

jquery-watermark plugin and HTML5 email input type not working correctly

diveintohtml5 says it's okay to start using the email form type. So I am trying it out on one of my forms. I'm using jQuery and a plugin called jquery-watermark. It makes the placeholder element work across browsers. The plugin still works on Firefox 3.6 but on Opera 10.61 and Chrome 6 the placeholder isn't rendered. <script type="text...

Regex email address validation fails if Underscore character present

Hi! I'm very new to Regular Expressions, but I thought it'd be the best way to validate email addresses entered on my form. My Regex works, except if the email address entered has an underscore character (_) in it. Because of my lack of experience with regular expressions, I'm not sure where in my pattern I'm supposed to add the offen...

PHP email validation

For PHP what is the best email validation using preg, NOT ereg because it's deprecated/removed. I don't need to check if the website exists (it's not like maximum security). I've found many ways with ereg but they (obviously) aren't good practice. ...