Verify email adress?

[Allow2010]

Hi all,

i am looking fo an easy way to verify that an email adress (entered by the user) is (as) correct (as possible).

Things like

- is there an @ at a location that is valid

- is there an . at a location that is valid

- is the top level domain (.com/.net/...) valid (maybe better not as new top level domains come up)

- maybe check if the mx server for an email adress exists

does anyone have an UDF/Functin for this? Thanks!

[Melba23]

Allow2010,

This RegExp information should help you make sure that the format is correct.

M23

[Allow2010]

Thanks for the idea, but this will probaly cause more trouble than it can prevent:

Another trade-off is that my regex only allows English letters

is one of the problems and also some top level domains are not covered...

better would be a real verification of the email (by contacting the server)....is this possible?

Edited December 31, 2011 by Allow2010

[lpm]

I have the same question, and seek an answer. I ran into this article that may shed some light upon what I want to achieve. See the quote here under. Can this be done in AI? And how? 

 

http://www.ip-tracker.org/checker/email-lookup.php

Email Checker: Lookup and Check Email With Email Checker

Email lookup also known as Email checker is very fast, free and accurate Email tool which provide live verification process of emails using next steps:

I.        First, Email lookup resolve host name (SMTP server) to IP address from Email that you are checking and then try to connect to that SMTP server via port 25. 
For example whatever@hotmail.com point to Email SMTP server mx4.hotmail.com with IP address 65.55.37.120. If connection is successful then our Email checker tool start to verify Email using Email Verifier process

II.        Email verifier process is the process of verifying email by sending SMTP HELLO command to other side (SMTP server) asking to verify email address. 
Once SMTP server accept our request and our "question" then he let us know of Mail ID / Recipient is OK or NOT.

III.        Final step of our email lookup process is to let you show answer from SMTP server: "the host states that the address is valid or not." 
Once we get answer we disconnect from SMTP server.

 

[Mannyfresh15]

....

Edited July 15, 2016 by Mannyfresh15

[msd1994]

Simple way to check, just loop through and check each char, if you find a "@" then look for a "." if you find that, you're good to go.

Here's a very simple example.

 

#include <MsgBoxConstants.au3>

Global $i = 0

Global $str=String("blahblah@test.com")


For $i = $i To StringLen($str)-1
   If StringMid($str, $i, 1) == '@' Then
      ExitLoop
   EndIf
Next

For $i = $i To StringLen($str) -1
   If StringMid($str, $i, 1) == '.' Then
      MsgBox(0, "Success", "Email address is valid")
   EndIf
Next

 

[Mannyfresh15]

4 hours ago, msd1994 said:

Simple way to check, just loop through and check each char, if you find a "@" then look for a "." if you find that, you're good to go.

Here's a very simple example.

 

#include <MsgBoxConstants.au3>

Global $i = 0

Global $str=String("blahblah@test.com")


For $i = $i To StringLen($str)-1
   If StringMid($str, $i, 1) == '@' Then
      ExitLoop
   EndIf
Next

For $i = $i To StringLen($str) -1
   If StringMid($str, $i, 1) == '.' Then
      MsgBox(0, "Success", "Email address is valid")
   EndIf
Next

 

msd1994,

Not to step on your toes but you method is not the best because if you input "blahblah@.com" it will tell is a valid E-mail address when we all know that's not true. I recommend checking my app and code because they use two different methods the first is a local format check and then if it's a valid format will pass to second check which is an online check to verify E-mail's legitimacy..  Internet connection is required to pass to second verification and my app will check internet connectivity beforehand. I must say that credits to my app aren't all mine check my comments in my code to find out more. 

Edited June 20, 2016 by Mannyfresh15
Typo

[msd1994]

21 hours ago, Mannyfresh15 said:

msd1994,

Not to step on your toes but you method is not the best because if you input "blahblah@.com" it will tell is a valid E-mail address when we all know that's not true. I recommend checking my app and code because they use two different methods the first is a local format check and then if it's a valid format will pass to second check which is an online check to verify E-mail's legitimacy..  Internet connection is required to pass to second verification and my app will check internet connectivity beforehand. I must say that credits to my app aren't all mine check my comments in my code to find out more. 

he could add a check for something that's neither "@" nor "." in between, but this is just the simplest way I thought to do without regex. Your app would most likely be a more foolproof method ,assuming it was made specifically to check if an email address is valid, if he chose to use it, I haven't personally looked at it

[Mannyfresh15]

I see your point and yes you're right a person could just add a check in between @ and . Whoever, I think your example is clearer now 

Edited June 21, 2016 by Mannyfresh15

[spudw2k]

It might be best to establish what the rules are and make sure they are all accounted for.  
https://en.wikipedia.org/wiki/Email_address#Local_part
https://en.wikipedia.org/wiki/Email_address#Domain_part

Definitely accomplish-able with RegEx...but that's beyond my skill-set (capture groups, back references....ugh)

[Mannyfresh15]

2 hours ago, spudw2k said:

It might be best to establish what the rules are and make sure they are all accounted for.  
https://en.wikipedia.org/wiki/Email_address#Local_part
https://en.wikipedia.org/wiki/Email_address#Domain_part

Definitely accomplish-able with RegEx...but that's beyond my skill-set (capture groups, back references....ugh)

I wouldn't change the settings of the function in my code as most if not all of the major E-mail providers will flag other kind of formats as invalid format so I just gonna stick with my method. Check the Images below.

 

 

If images not showing go to: http://imgur.com/a/9OQw7

This is an example of a valid E-mail address 

Edited June 21, 2016 by Mannyfresh15
IMG not showing