Validate email address (check SMTP)
Hello
When a member joins our website, an email is sent confirming the registration. Few of them are non-existent email addresses.
I would like to know if there is a way to validate an email address in coldfusion (check SMTP) without sending an email to the recipient so that we have legitimate email. This procedure is necessary to prevent our being on the list of spam IP. We have control of the string using regular expressions.
Help much appreciated
Thank you
Mottakutty
Oh hang on, hang on I got to use it:
"I think you misunderstand, Adam" - Note the use of the comma
OP - you say you want to do a check of SMTP (this means to connect to the mail server and verify that the account exists) but then talk about regular expressions to validate the string passed to you according to the RFC? It's two things.
First to have as Adam said, you can validate the e-mail address using CFINPUT and once again on the server side using the isValid(). By the way, isValid ("email") is actually full of bugs, if you read the email address RFC, which unfortunately, I had only once.
However if you really want to test whether or not address exists on the mail server, there is no way to do this using CF. you could (if you were clever enough to Java) write yourself some classes which collect MX records for a domain, and then telnet to it. Basis conversation SMTP would you:
220 remoteserver.something.com Microsoft ESMTP MAIL Service
HELO yourdomain.com
250 remoteserver.something.com Hello
MAIL FROM:[email protected]
250 2.1.0 [email protected]... Sender OK
RCPT TO:[email protected]
550 5.7.1 unable to relay for [email protected]
Unless you get a 250 in response to your RCPT TO command, it is an invalid account.
However.
There really no need to go that far in order to validate the account. Much easier is to send an e-mail of confirmation with a link that you must click to verify their account.
Sending e-mail to a non-existent address is * not * take you spam blocklists. The only thing that you is if you send email to one honeytrap put people like Messagelabs email accounts up. Nobody knows specifically what these are (because that would go against the point), but they are only ever affected if you just choose a domain name and to mass-mail each e-mail address prefix you can think of the hope of the sticks. Nobody will come to your website and enter one of these e-mail addresses.
I suspect that you already do enough to make sure you aren't on blacklists. Usually you only end up one if your mail server sends spam, things are a lot smarter these days.
Tags: ColdFusion
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How to validate email address syntax?
Hello
I want to check the email address to make sure that users are sign up with an email from a particular area
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Can someone please tell me how and if this can be achieved by using the MEASUREMENT and PHP?
Thank you very much
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Hello
Yes, it can be done. At the end of most of the assistants is the possibility for validation. Usually when choosing an email you would choose email address, but that would make [email protected] because you want it to be specific, you need choose the regular Expression, then add your expression to the field.
Something like this would work as a regular expression.
[a-zA-Z] [a-zA-Z0-9]*[@]mydomain\.com
Regular expressions as:
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< image has been deleted by the moderator >
Hello
We've checked your account details, I wish to inform you that all is well with your account.
I would ask to connect with a correct email address. The area of the screenshot says * @ otmail.comg. However, it is supposed to be hotmail.com.
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Why the in email Email Address' infected are hidden
OK, this is a follow-up question to a previous post entitled "how to see the emails infected."
After receiving an e-mail usurped supposedly from a friend, I decide to examine the email address the email was sent by.
So I click 'Reply to all' but have no intention on send to anyone.
I then double-click each email address and page properties 'add a contact' pulls up (but I have no intention to add the contact to mine)
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by smtpauth - .net vit.online with esmtpa (Exim 4.80)
(envelope - from <*** email="" address="" is="" removed="" for="" privacy="" ***="">)
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You may provide me with an example.
Is your intention to acquire the skills to do it yourself?
There are a lot more to an e-mail message that you can see in the header block. Each letter has a certain structure which you can study on Wikipedia while searching for keywords such as MIME. Here is an example. By not following the regulatory structure, spammers can generate different effects that can be detected by virus filters so they can mark it as spam. You can examine the raw content of an e-mail message with tools such as getmail.exe. Get ready to devoted considerable time to the effort.
Return-Path:<*** email="" address="" is="" removed="" for="" privacy="" ***="">
Delivered-To:<*** email="" address="" is="" removed="" for="" privacy="" ***="">
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by mbox5.mail.xcom.com (Dovecote) with LMTP id 10ciFvx7RVUkggAAseoyOg
for <*** email="" address="" is="" removed="" for="" privacy="" ***="">; Sunday May 3, 2015 03:38:34 + 0200
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by mx3.mail.xcom.com (Postfix) with ESMTP id 72D558054B
for <*** email="" address="" is="" removed="" for="" privacy="" ***="">; Sunday May 3, 2015 03:38:34 + 0200 (CEST)
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by mailgw.webways.com (Postfix) with ESMTP id 345513B 19
for <*** email="" address="" is="" removed="" for="" privacy="" ***="">; Sunday May 3, 2015 03:38:34 + 0200 (CEST)
X-Virus-analysis: by amavisd to mailgw.webways.com
Received: from mailgw.webways.com ([127.0.0.1])
by localhost (mailgw.webways.com [127.0.0.1]) (amavisd-new, port 10024)
with LMTP id 2725XERy1k2L for <*** email="" address="" is="" removed="" for="" privacy="" ***="">;
Sunday May 3, 2015 03:38:33 + 0200 (CEST)
Received: by mailgw.webways.com (Postfix, from userid 500)
ID 677B43B1B; Sunday May 3, 2015 03:38:33 + 0200 (CEST)
X - sieve: drawers sieve 0.4.1
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Delivered-To: * e-mail address is removed from the privacy *.
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by mailgw.webways.com (Postfix) with ESMTP id 553BB3B1A***>***>***>***>***>***>***>
for <*** email="" address="" is="" removed="" for="" privacy="" ***="">; Sunday May 3, 2015 03:38:33 + 0200 (CEST)
X-Virus-analysis: by amavisd to mailgw.webways.com
Received: from mailgw.webways.com ([127.0.0.1])
by localhost (mailgw.webways.com [127.0.0.1]) (amavisd-new, port 10024)
with LMTP id 6X1qVxKKEDpl for <*** email="" address="" is="" removed="" for="" privacy="" ***="">;
Sunday May 3, 2015 03:38:32 + 0200 (CEST)
X-Original-Helo: wat.watadkitoko.com (iRedMail: http://code.google.com/p/iredmail/)***>***>
Received: from wat.watadkitoko.com (wat.watadkitoko.com [192.254.195.63])
by mailgw.webways.com (Postfix) with ESMTPS id 3B9813B19
for <*** email="" address="" is="" removed="" for="" privacy="" ***="">; Sunday May 3, 2015 03:38:32 + 0200 (CEST)
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by wat.watadkitoko.com with esmtpa (Exim 4.85)
(envelope - from <*** email="" address="" is="" removed="" for="" privacy="" ***="">)
ID 1YoirL - 00020Q - YEAR; Saturday, may 2, 2015 20:38:21-0500
Reply-To:<*** email="" address="" is="" removed="" for="" privacy="" ***="">
From: rates Chehabi «»<*** email="" address="" is="" removed="" for="" privacy="" ***="">
Re: * SPAM * Important!
Date: Sunday 3 may 2015 03:38:09 + 0200
MIME-Version: 1.0
Content-Type: text/html;
charset = "Windows-1251".
Content-Transfer-Encoding: 7 bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2600.0000
X-MimeOLE: Produced by Microsoft MimeOLE V6.00.2600.0000
X anti-abuse: this header was added to track abuse, please attach it to any report of abuse
X anti-abuse: primary Hostname - wat.watadkitoko.com
X anti-abuse: field Original - stone.com
X anti-abuse: author/caller UID/GID - [47 12] / [47 12]
X anti-abuse: sender address domain - pawpetstore.com
X Get-Message-Expéditeur-Via: wat.watadkitoko.com: authenticated_id: * e-mail address is removed from the privacy *.
Message-Id:<*** email="" address="" is="" removed="" for="" privacy="" ***="">
X-Spam-Flag: YES
X FCMA-Score: 100
X FCMA-analysis: v = 2,1 cv = Nafy1gz4 c = 0 sm = 1 tr = 0 p = Os_Rm99zqn0A:10
a = Z2k1iAh4l3CSraD9SQOBOg ==: 117 == a = Z2k1iAh4l3CSraD9SQOBOg: 17
a = 9cW_t1CCXrUA:10 a = Dyoqhi_TatcA:10
Greetings to you,
Good day to you. I'm sorry to bother you, but I have a great proposal for you. My name is
Rates Chehabi, I am of the Syria.
Can you allow me to inform you of my desire to enter into a business relationship with you personally
or from your company for a lucrative investment in the broad partnership owned by me and my Syrian
childhood best friend.
There was bad situation of things in Syria and the deterioration of things here day after day.
A lot of damage is still ongoing because I think're you aware of this fact.
I would like to know more about you and enter into a business relationship with you, our intention in
This issue is to have investments offshore project in your country because of lack of stability, subject to
change and political instability in Syria. I think you must have heard and seen a few about
these difficult times on CNN that happened for some time.
Your position in this arrangement will be as follows:
Best regards,***>***>***>***>***>
Rates Chehabi.
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