.NET Email Validation

The .NET Email Validation Library by Kellerman Software is the cutting edge of email validation. We spent months analyzing fake email addresses. The fake email pattern checker eliminates numerous bad emails that actually return as valid email addresses with our competitors. It detects mail servers that implement grey listing so the email addresses can be verified later. It detects servers that are blocking your mail server. It detects disposable email addresses such as mailinator.com. It detects free email addresses. Sick of curse words in your mailing list? Eliminate them. The .NET Email Validation library doesn't have levels; it has options. Choose whatever options suit your project. Yes it performs industry standard syntax checking, mxRecord (Mail Exchange Record) lookups, and mailbox verification using multiple threads asynchronously. It supports all .NET project types including .NET Framework .NET Core, Mono, Xamarin iOS, Xamarin Mac, Xamarin Android, UWP, Unity, .NET 5, and .NET 6. It can be used with any .NET language including VB.NET and C#. Download the full list of features.

While it can be purchased separately, this product is also included in the Gold Suite. Gold Suite subscribers receive all product updates and all new products as part of a yearly subscription. It is the best value in the industry.

Features

If you have a project need to validate email in .NET, the .NET Email Validation Library has the highest capabilities to validate email in C#.

How does the .NET Email Validation Library stack up against the competition?

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Download a free 30 day trial today.

• Full working version
• Includes technical support
• Compatible with Windows, macOS, Linux, iOS, Android and Docker.
• Compatible with .NET Framework 3.5 and higher, .NET Core 2.0 and higher, Mono 5.4 and higher, Xamarin.iOS 10.14 and higher, Xamarin.Mac 3.8 and higher, Xamarin.Android 8.0 and higher, Universal Windows Platform 10.0.16299 and higher, Unity 2018.1 and higher, .NET 5, and .NET 6.

Download Options

• Download Full Installer
• Download Zip No Installer
• Download NuGet Package
• Online Help

When using this software you meet the following system requirements.

• Compatible with Windows, macOS, Linux, iOS, Android and Docker.
• Compatible with .NET Framework 3.5 and higher, .NET Core 2.0 and higher, Mono 5.4 and higher, Xamarin.iOS 10.14 and higher, Xamarin.Mac 3.8 and higher, Xamarin.Android 8.0 and higher, Universal Windows Platform 10.0.16299 and higher, Unity 2018.1 and higher, .NET 5, and .NET 6.

Using .NET Email Validation Library is easy. Instantiate the object and call a method. See the example below which detects a typo in the email address.

Result myResult;
EmailValidation valid = new EmailValidation();

myResult = valid.ValidEmail("bob.smith@gmaill.com");

Q: How do I use my license key?
A: EmailValidation valid = new EmailValidation("my user name","my license key");

Q: I lost my license key how do I retrieve it?
A: Go to your account

Q: I lost my software how do I retrieve it?
A: Go to downloads

Q: Where can I download the latest version of my software?
A: Click the download tab.

Q: How does the licensing work?
A: Each developer that uses the .NET Email Validation Library must have a license. You may distribute your application to end users royalty free or use it on an unlimited number of servers. A site license is for all the developers in a single building. An enterprise license would be for numerous developers in multiple buildings.

Q: Does the .NET Email Validation Library work with ASP.NET?
A: Yes, the .NET Email Validation Library works with any .NET project type.

Q: What happens when the trial expires?
A: An exception is thrown, indicating that the trial is expired.

Q: I am getting a message saying that Port 25 is Blocked. How do I get around this?
A: SMTP validation occurs on port 25, that is per the spec of SMTP. A different port cannot be used. Your Internet Service Provider has blocked port 25 because this port is also used to send spam. To get around this you can purchase an air card or wifi hotspot or run the email validation on your email server.

Q: If we integrate your library in our applications, will it connect your server to validate email?
A: No, it contacts each email mail server directly. For example, if it is john@hotmail.com address it will contact hotmail.com to figure out if the address is valid.

Q: If you have list of fake email domains/disposed email domains, how often do you upgrade the list ? How we can get upgrades?
A: We have many customers that use the .NET Email Validation Library. As soon as a customer notifies us of a fake domain or disposed email domain it goes into a hotfix. Normally it is released a within a week after that. When you purchase the .NET Email Validation Library updates are free for a year.

Q: Will this library use our smtp server for validating emails?
A: No, it contacts each email mail server directly. For example, if it is john@hotmail.com address it will contact hotmail.com to figure out if the address is valid.

Q: How does this library works?
A: The .NET Email Validation creates up to 50 threads to perform validation. Queued emails are picked up by available threads. The requested validation options are performed for each email address until one of the validations fail.

Q: Will this library send any spam emails to validate email addresses?
A: No, it contacts individual SMTP Mail Servers and asks if an email address is valid. However, if your IP Address does not normally communicate with other SMTP Servers, you will have to warm up your IP Address or the remote SMTP server may think you are going to send spam.

Q: Do you charge per email validation?
A: No, an unlimited number of emails can be validated with the purchased version.

Q: We are receiving messages like: Maximum number of emails validated for trial. No validation performed. Can we test the full version?
A: The trial version has a limit on the amount of email addresses that can be validated at one time. Please purchase to test the full version.

Q: How much do you charge to get source code in c#?
A: See the Developer Licenses drop down.

Q: How often we need to upgrade your library?
A: After purchasing, major and minor updates are free for a year. After that, upgrades are 50% off the retail cost.

Q: Is the license perpetual?
A: Yes.

Q: What are the best practices for using your library?
A:
1. The best option is to run the .NET Email Validation Library on your mail server. No SPF record is required and reverse IP lookups required by other mail servers will succeed.
2. The second best option is to run the .NET Email Validation Library on a web server with an SPF record. When validating emails some validations will fail because of reverse IP lookups.
3. The third option is to run the .NET Email Validation Library on a web server without an SPF record. Most likely the server will be blocked if performing more than 10,000 validations per day.
4. The fourth option is to run on a PC with port 25 open. Most likely the IP Address of your PC will be blocked if performing more than 10,000 validations per day.
5. The worst option is to run on a PC with port 25 blocked. Only simply regex validation can be performed.

If you normally don’t send out that many emails from your IP address, it may need to be warmed up.

If you are planning to verify more than about 10,000 email addresses at a time, it is important to ramp up your email verification in order to build the reputation of your IP address. The problem is if you were to verify a large number of email addresses when your IP address does not normally send out that many emails, the ISPs are much more likely to defer or block your verification. Once you have ramped up successfully, you can verify a much higher email addresses.

Recommended Schedule (verifications can be broken up into smaller batches sent every 4 to 6 hours):
• Verify 10,000 email addresses on days 1, 2 and 3
• Verify 20,000 email addresses on days 4, 5 & 6
• Verify 40,000 email addresses on days 7, 8 & 9
• Verify 80,000 email addresses on days 10, 11 & 12
• Verify 160,000 email addresses on days 13, 14 & 15
• Verify 300,000 email addresses on days 16 +