They all work in different ways, but essentially they do the same - they make sure that a form field has been properly filled by the user.
NET component that would save me the time and trouble of reading RFC 821 and writing a bunch of complex regexes. NET Email Validation Library which goes far beyond simple validation and detects so many things that I didn’t even think about: fake emails, disposable addresses, grey listing and much more. It recognizes thousands of disposable email domains such as mailinator.com, spamavert.com, and
Entity Framework 4.1 brought us Code First and the Db Context.
It uses multiple threads and takes advantage of multiple and multi-core processors. It has a valid syntax, a valid mail server and the mail server actually returns true for a mailbox check.
Gold Suite subscribers receive all product updates and all new products as part of a yearly subscription. Supports RFC 821 syntax checking of email addresses, Mx Record (Mail Exchange Record) lookup, and Mailbox account checking via SMTP.
While it can be purchased separately, this product is also included in the Gold Suite.
If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, Mobile OK content, or to find broken links, there are other validators and tools available.
As an alternative you can also try our non-DTD-based validator.