Chilkat v11.3.0 Release Notes

Pinned December 16, 2025

  The main features of this release focus on Chilkat’s Ai class, enabling interactive AI response streaming directly into embedded desktop application browsers. It supports Azure, custom base URLs for OpenAI-compatible providers, and local providers like Ollama. ✨ New Features Ai Real-Time Streaming AI Responses to Embedded Browsers in Desktop Apps — Stream AI responses […]

Chilkat v11.2.0 Release Notes

Pinned November 3, 2025

Previous Version: Chilkat v11.1.0 Release Notes The main addition in v11.2.0 is the Chilkat.Ai class, and the Chilkat.StringBuilder.MarkdownToHtml method. Ai: The Chilkat AI class provides a unified API for interacting with different AI providers: OpenAI, Google, Claude, xAI, Perplexity, and DeepSeek. It provides functionality for conversation management, multimodal inputs, and streaming mode. Markdown to HTML […]

Semantic Versioning Starting with Chilkat 10.0.0

Pinned September 26, 2024

Starting with the v10.0.0 release (end of September 2024), Chilkat moves to standard semantic versioning.   Prior to this release, for various technical reasons, Chilkat was stuck with versions 9.5.0.xx, where only xx changed. For this first leap to semantic versioning, where the major version changes to 10 (from 9), there are no backward incompatible changes.  […]

Office 365 IMAP, POP, SMTP OAuth2 with Client Credentials

June 19, 2023 in Uncategorized

See https://learn.microsoft.com/en-us/exchange/client-developer/legacy-protocols/how-to-authenticate-an-imap-pop-smtp-application-by-using-oauth#use-client-credentials-grant-flow In my opinion, this is still too complicated. An “easy button” is needed.

Office365 POP3 Authenticate Fails but Previously Succeeded

June 15, 2023 in Uncategorized

It’s normal for OAuth2 access tokens to expire after some time, such as 1 hour, and then you’ll need to refresh and retry. For example, this error in the LastErrorText for a call to Pop3Authenticate could indicate the OAuth2 accces token expired: Pop3Authenticate: DllDate: Mar 28 2023 ChilkatVersion: 9.5.0.94 UnlockPrefix: *** Architecture: Little Endian; 32-bit […]

Office365 Modern Authentication for IMAP, POP3, and SMTP

August 13, 2022 in IMAP

This post documents how to implement Modern Authentication (OAuth2) for Office365 for the IMAP, POP3, and SMTP protocols.  The very first thing you’ll need to do is to create an “App Registration” in Azure Active Directory. See this Chilkat blog post for Instructions for Setting Up an App Registration in Azure for Modern Authentication for […]

Create Azure App Registration for use with IMAP, POP3, and SMTP

August 13, 2022 in Exchange Online

1) Go to https://portal.azure.com/#home and login to your Microsoft account. then go to Azure Active Directory.   2) Click On App Registrations * Copy your Tenant ID, you’ll need it later. 3) Click on “+ New registration” 4) Name your App and Click Register. Give it a name. For the Redirect URI, select “Web” and […]

POP3 Error: No X-UIDL header found

June 7, 2018 in Uncategorized

The Chilkat MailMan class can fetch emails from a POP3 server in two ways: by sequence number, or by UIDL. When an email is fetched by UIDL, or fetched in a way such that a full mapping of UIDL’s to sequence numbers was retrieved, Chilkat will add an “X-UIDL” header to the Email object that […]

Number of Messages in a POP3 Inbox

June 4, 2012 in Uncategorized

There is often confusion about the number of messages in a POP3 inbox (for a given user account). Here are the typical scenarios that cause confusion: If your email client such as Outlook or Mozilla Thunderbird seem to show more messages than what Chilkat can see, then make sure you realize which messages are stored […]

GMail POP3 Authentication — Must Unlock Captcha

May 11, 2011 in Uncategorized

If captcha is enabled on your GMail account (and it is enabled by default), then GMail POP3 authentication will fail with this error (even though a correct login/password is provided) **** Connected to pop.gmail.com:995 < +OK Gpop ready for requests from 57.215.212.123 c23pf1097242ibu.22 > USER myaccount@something.com < +OK send PASS > PASS **** < -ERR […]

POP3 over HTTP Proxy

November 30, 2009 in Uncategorized

ASP: POP3 using HTTP Proxy SQL Server: POP3 using HTTP Proxy C#: POP3 using HTTP Proxy C++: POP3 using HTTP Proxy MFC: POP3 using HTTP Proxy C: POP3 using HTTP Proxy Delphi: POP3 using HTTP Proxy Visual FoxPro: POP3 using HTTP Proxy Java: POP3 using HTTP Proxy Perl: POP3 using HTTP Proxy PHP: POP3 using […]

Understanding GMail’s Behavior

September 16, 2009 in Uncategorized

This blog post will explain GMail in a way that will help you understand it’s seemingly strange behavior. The question that prompted this post is as follows: I am able to read mails from GMail mailbox using MailMan object. Is there any options to delete a mail permanently from GMail mailbox? When I am using […]

Exchange Server – POP3, IMAP, and SMTP

September 15, 2009 in Uncategorized

Question: May I ask if is possible use Chilkat components to connect to MS Exchange 6.5 and higher ? I am thinking about purchase of MailMan component or other as it is, however I would like read some example in C# for reading emails from Exchange and sending emails via Exchange after connecting to the […]