Verify an Email Address
The fastest way to verify email addresses is to make an online verification,
Free Email Address Verifier is an email verification tool which actually connects to the mail server and checks whether the mailbox exists or not. Practically, this free email verification tool lets you verify if an email address is valid, properly formatted and really exists. For some domains you can’t verify whether the address is good or not, because their mail servers don’t cooperate.
Yellowpipe Email Verification is a free tool to verify an email address. This free email validator let you verify if an email address is valid, properly formatted and really exist. This is one of the most complete free email verification you can perform because we actually connect to the mail server and check that the mailbox and username are existing.
Email-unlimited.com has an online tool where you can verify email addresses online. email-unlimited.com has the same mechanism to verify if an email address is valid, properly formatted and really exist, like Yellowpipe Email Verification or Free Email Address Verifier.
You also can buy a software which one you can verify hundreds of email addresses,
Advanced E-mail Verifier will check every email address from a database or a mailing list and determine if the e-mails are still valid. Advanced E-mail Verifier is easy to use, powerful and reliable 
utility to verify and clean up your mailing list. Advanced E-mail Verifier is your powerful solution for the “message delivery error”. Advanced E-mail Verifier is designed for system administrators, webmasters, programmers as well as for everyone who has his own mailing lists and needs to keep the lists up-to-date. With Advanced E-mail Verifier you can: Clear mailing list or database from bounced and undeliverable email addresses, Verify email addresses directly from the databases without import-export, Load large mailing lists for verification in seconds, Import email lists for verification from Paradox, DBase, Excel, Text (.CSV, Word HTML, Lotus 1-2-3, QuattroPro, XML, MS Access files, and DBISAM tables (.dat files); Quickly save the verification results to a text file; Export the verification results to Paradox, DBase, Excel, Text (.CSV), HTML, Word, SYLK, DIF, Lotus 1-2-3, QuattroPro, SQL script, XML, MS Access, Rich text format files, and MS Windows Clipboard; Sort and filter the email addresses to organize them in the most convenient way for you; Safely recover your data – if your computer hangs in the middle of any operation; Advanced E-Mail Verifier restores the data or Decrease the Internet traffic and save your bandwidth.
Atomic Email Verifier – a program that verifies the validity of e-mail addresses in mailing lists. Atomic Mail Verifier is a unique program that checks email addresses for the validity. Unlike other email verification programs, our verifier uses three levels of verification to ensure you will not lose any valid address. After loading your mailing list or pasting some email addresses for validation, Atomic Mail Verifier begins to verify each e-mail address. All addresses are checked in multithreaded mode that speeds up the entire process. Three steps of verification include:
1. E-mail addresses syntax check. On this step Atomic Email Verifier marks invalid addresses such as bill#yahoo.com, kate!@$aol,com etc.
2. Availability of the domain of e-mail addresses. On the second step program checks the availability of the domain, i. e. it marks valid such addresses as bill@yahoo.com, kate@hotmail.com and marks invalid any nonexistent domain.
3. Existence of e-mail addresses on their mail servers. On the final step, program tries to establish SMTP connection with mail server and test the address there.
To verify each email address in the list you may complete all the steps or only some of them. For example, if you have a huge list with hundreds of thousands of addresses then you should process only the first two steps, because checking of each address on its mail server takes much time. This type of mailing list verification usually removes one third of all “bad” addresses.If your mailing lists has no more than several thousand addresses then you may complete all the steps of verification. Three steps guarantee removing most non-existing addresses.Atomic Email Verifier is fully integrated with other Atomic e-marketing tools. So, you can collect the email addresses using our email extractors (e.g. Atomic Email Hunter), transfer gathered emails to AMV to remove obsolete addresses and then use our bulk emailer – Atomic Mail Sender to send out mass mail. Optionally, Atomic Subscription Manager can automatically manage the mailing list and track all subscription instructions.
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