MailBee.NET POP3 Component

MailBee.NET POP3 Component

Enable your .NET applications to receive, parse, and display e-mails at lightspeed
MailBee.NET Objects bundle includes SMTP, POP3, IMAP, Security, Antispam, Outlook Converter, Address Validator, PDF components and also BounceMail, HTML, MIME, ICalVCard components which are a free functionality.

MailBee.NET POP3 is a high-performance and easy-to-use .NET component developers can use to download mail from POP3 servers, parse it, prepare it for display in desktop or web applications, and more.

MailBee.NET POP3 supports POP3 PIPELINING which can make e-mails headers download 10+ times faster!

MailBee.NET POP3 bundle includes a set of MIME objects such as MailMessage and Attachment which are used for e-mail parsing. It fully supports the modern async/await API for building scalable and responsive applications.

Visual Studio


Written in 100% managed code, MailBee.NET POP3 only requires the .NET framework be installed on the computer.

MailBee.NET POP3 can be used in any .NET language including C# and VB.NET. Supported .NET frameworks include .NET 2.0/3.0/3.5/4.0/4.5/4.6, both 32-bit and 64-bit. Also supports Xamarin Mono, iOS, Android.

With MailBee.NET Objects license, you also get these MailBee.NET components for free: BounceMail, HTML, MIME, ICalVCard.

MailBee.NET POP3 Component fully supports:


  • POP3
  • HTTP
  • SASL
  • NTLM
  • Kerberos
  • SOCKS4/5
  • HTTP Proxy


  • DomainKeys/DKIM
  • S/MIME
  • APOP
  • FIPS 104-2


Servers & Services

  • MS Exchange
  • Lotus Notes
  • GroupWise
  • IMail
  • MailEnable
  • AxiGen
  • SmarterMail
  • SurgeMail
  • MDaemon
  • Kerio
  • CommuniGate
  • hMailServer
  • Exim
  • Postfix
  • Sendmail
  • Qmail
  • Courier
  • Dovecot
  • Cyrus
  • Zimbra
  • GMail
  • Hotmail
  • Yahoo

...and any POP3/SMTP/IMAP compliant servers

POP3 Object

  • Download entire messages
  • Download headers only
  • UNIQUE Download messages/headers in PIPELINING mode - can boost performance up to 1000%
  • Async/await methods
  • UNIQUE Download messages with a single line of code (QuickDownloadMessage)
  • Download messages through a proxy server
  • Get already downloaded messages if the entire operation failed in the middle
  • Delete messages
  • Supports secure TLS/SSL connections out-of-box (supports Gmail, etc)
  • Secure authentication (APOP, CRAM-MD5, DIGEST-MD5, NTLM, Kerberos)
  • UNIQUE Windows Integrated Authentication (authenticate using the current Windows user credentials)
  • User-defined authentication methods
  • Automatic detection and use of POP extensions (CAPA)
  • Logging POP3 session into a file or memory
  • Returns e-mails as MailMessage objects which can be interchanged with other objects (Smtp, etc)
  • Can check DomainKeys/DKIM signatures of e-mails (using SMTP component)
  • Parses bounced e-mails and delivery notifications
  • Send user-defined commands to the server
  • Rich set of events and asynchronous processing options
  • Can be placed on the form or created in the code

Pop3 Object reference...

MailMessage Object

  • Import and export from/into System.Net.Mail.MailMessage
  • Used by Smtp object as outgoing e-mail
  • Returned by Pop3 and Imap objects as incoming e-mail
  • Multiple recipients (To/CC/BCC)
  • Multiple attachments
  • Advanced mail merge
  • Can be encrypted, signed, decrypted, or verified with Smime object
  • Easy access to plain-text and HTML body
  • Full support of international encodings and charsets
  • Can extract attachments from MS-TNEF (winmail.dat) files
  • Access to every MIME part
  • Access to all message headers
  • Access to message timestamps ("Received:" headers)
  • UNIQUEConversion from HTML to plain-text and vice versa including high-lighting of URIs, images, quotations, etc
  • UNIQUEFull support of creating and displaying HTML messages with embedded pictures in desktop and web applications
  • UNIQUEAccess forwarded messages (GetEncapsulatedMessage)
  • Forward message as attachment
  • Import HTML file or web page into e-mail
  • Import & export message data from/into memory, file and stream
  • Serialize into XML and deserialize from XML
  • Base64 and Quoted-Printable
  • Confirm Read & Confirm Receipt
  • Reply-To, Priority, Importance, Sensitivity, etc

MailMessage Object reference...

What's new

Version 10.0

  • Async/await methods.
  • Xamarin Mono, Android, iOS support.
  • .NET 4.5 optimized edition.
  • TLS 1.1 and TLS 1.2 support.
  • Bounce database in memory (instead of a set of XML files).
  • Improved I/O performance with increased TCP buffers.
  • Tested with Windows 10, Visual Studio 2015, .NET Framework 4.6.

See Version History for details

Version 9.0

  • FIPS 104-2 compatibility enforcement.
  • SecurityRules(SecurityRuleSet.Level1) attribute for better compatibility.
  • TnefParser class to parse standalone winmail.dat files.
  • Autodetection of SSL settings for and (in addition to gmail, yahoo, etc).
  • SASL PLAIN login authentication method tolerates the response which cannot be decoded.
  • AuthenticationOptions.BypassLoginProcedure option for custom non-SASL logins.
  • E-mail parser supports CR line endings (in addition to CRLF and LF endings).
  • Global.FixBadDates property to allow invalid Date values in e-mails.
  • DKIM RSA certificate parsing fix.
  • Bounce parser bugfixes and new bounce formats.
  • E-mail parser fixes to workaround misc. violations of MIME standard by improperly written composers (unclosed quote characters, etc).
  • MailBee.Html processor fix.
  • TNEF parsing fixes.
  • Log files include SSL handshakes.
  • NuGet support.
  • Authenticode digital signature for MailBee.NET assembly and the installer.
  • Refactored documentation (including new theme).

Clients Say:

"I've been looking at the MailBee.NET application and love it." Matt Yeager
"Thanks again for your help. I like your products..." Ron Hill
"By the way I love your software. Great work thank you." Dennis Drogemuller