• Products

    Microsoft .NET

    Microsoft .NET components, libraries & tools

    • EmailVerify for .NET
      Email validation library, featuring full IETF-compliant syntax validation, DNS checking, mailbox existence test and tools for advanced batch processing.
    • ProxyClient for .NET
      Powerful proxy client library with support for SOCKS 4, SOCKS 4a, SOCKS 5 and HTTP proxy servers, allowing to establish and accept remotely proxied connections.
    • MVC Extensions
      Powerful routing engine extensions for ASP.NET: allows to declare routes by way of attributes applied to MVC actions and generates URLs using compiler-safe lambda expressions.

    Microsoft Silverlight

    Microsoft Silverlight components, libraries & tools

    • EmailVerify for Silverlight
      Email validation library with Data Annotations support, featuring advanced syntax verification, ISP-specific syntax checks and disposable email address handling.

    Microsoft Visual Studio extensions

    Development tools, integrated into your favorite IDE

    • Routing Assistant
      FREE

      A cool and free Visual Studio extension which allows to easily browse, define, match and filter ASP.NET MVC routes within ASP.NET applications and web sites.

  • Purchase

    Products

    • EmailVerify for .NET
      • Licensing / editions
      • Volume discounts
      • Upgrades
      Purchase
    • ProxyClient for .NET
      • Licensing
      • Volume discounts
      • Upgrades
      Purchase
    • MVC Extensions
      • Licensing
      • Volume discounts
      • Upgrades
      Purchase

    Request a quote

    • Contact us
      Send a request to our sales staff.

  • Support

    Knowledge base

    • Browse the knowledge base
      Support documents for our products and services.

    Request support

    • Contact us
      Send a request to our customer support staff.

  • About us

    About Cobisi

    About our company, our team, our mission

    • Our company
      Cobisi company information.
    • Our mission
      About what we aim to achieve.
    • Follow us
      Follow us on Twitter.

    Contact us

    • Contact us
      Send a request to our customer support staff.

  • Company blog

    Latest posts from our blog

    Shared thoughts about our technologies, products and services

    • Routing Assistant reached version 1.7
      Published on Thursday, March 21, 2013

    • Verifalia: a new, complete hosted email validation service
      Published on Thursday, December 6, 2012

    • Routing Assistant v1.4 released
      Published on Friday, October 12, 2012

The Cobisi Blog

Let the voice be heard

  • Contact us
  • Knowledge base

EmailVerify.NET v4.2 released: better greylisting detection and improved control flow

Published on Thursday, April 21, 2011
This minor release features a renewed temporary mailbox handling, with a more precise greylisting detection that supports many new SMTP servers: now every SMTP status code that reports a temporary unavailability of a mailbox will correctly map back to the MailboxTemporarilyUnavailable verification status.

Version 4.2 also includes an improvement to the email validation flow with regards to the way disposable email addresses (like @mailinator.com, @10minutemail.com, @despam.it, etc.) are handled: this kind of validation can now be configured to be non-fatal, and have EmailVerify.NET to keep validating upper validation levels (if requested) as well. This way, despite the fact many DEAs providers are known to be catch-all, you can force the component to validate mailboxes for them in any case.
We have added a new property named IsDisposableEmailAddress to the validation result, so that you can always check if a given email address has been detected as disposable (on the Disposable validation level) or not.

This release also includes a bugfix for a weird licensing issue that happened under certain ASP.NET impersonation scenarios and, of course, an updated reference guide that reflects the newest changes in the component.

Stay tuned! :)

--
Efran Cobisi
EmailVerify.NET lead developer


Latest entries

March, 2013

  • Routing Assistant reached version 1.7

December, 2012

  • Verifalia: a new, complete hosted email validation service

October, 2012

  • Routing Assistant v1.4 released

June, 2012

  • Just released: a new SEO extension for the ASP.NET MVC routing engine

April, 2012

  • Twelve new servers added to our hosted email validation service
  • Software Technical Writer needed (C#, .NET, ASP.NET), part-time, telecommute

January, 2012

  • EmailVerify.NET is now part of the Cobisi family of products

August, 2011

  • Just launched: hosted email validation service beta

July, 2011

  • New support for SMTP dialog extraction and analysis and advanced proxy binding

June, 2011

  • EmailVerify.NET v4.3 released: support for internationalized mailbox names and definitive RFC 5336 compliance
  • EmailVerify.NET reviewed on DevProConnections!

May, 2011

  • Faster catch-all validations for HotMail (MSN and Live included) and GMail email addresses

April, 2011

  • EmailVerify.NET v4.2 released: better greylisting detection and improved control flow
  • Respect Netiquette and avoid temporary bans

March, 2011

  • Why your DNS PTR record is so important

November, 2010

  • EmailVerify.NET v4.1.10.813 released
  • Yahoo! mailboxes validation in EmailVerify.NET v4.1

September, 2010

  • EmailVerify.NET v4.0 has been released

Products
  • EmailVerify for .NET
    • Features
    • Online demo
    • Download
    • Licensing / editions
    • Release notes
    • Purchase
  • ProxyClient for .NET
    • Download
    • Licensing / editions
    • Release notes
    • Purchase
  • MVC Extensions
    • Tutorial
    • Free edition download
    • Licensing
    • Release notes
    • Purchase
Support
  • Knowledge base
  • Request support

About Cobisi
  • The company
  • Mission
  • Follow us
  • Contact us
Copyright © 2005-2022 Cobisi Research. All rights reserved.
Cobisi Research - Via Della Costituzione, 31 - 35010, Vigonza - Italy (European Union)
VAT ID: IT04391160282