Authentication Problem with Sending Email in Office365 using SMTP

If SMTP authentication (using login/password) fails for your account, then it may be that your account is configured to require MFA (multi-factor authentication).   You may need to change settings to allow for legacy authentication (single-factor auth).   See Also, an app password may be required.  See    

Convert CkDateTime to Delphi TDateTime

Question: Which is the best way to convert a CkDateTime to a Delphi TDateTime? Answer: I didn’t know the answer, so I Googled “Delphi TDateTime” to see exactly what it is.  It brought me to this web page: In Delphi, TDateTime is a type that maps to a Double. In C++, the TDateTime class corresponds to the Delphi TDateTime […]

0x80090016 – Keyset does not exist

This blog post describes one possible cause for the “Keyset does not exist” error when trying to access/use a non-exportable private key via the Microsoft CNG or CryptoAPI. The situation was that the certificate was installed to the user’s Current User Personal Store, but the corresponding private key was stored in the Local Machine Key Store (machine keyset).  There were […]

OAuth2 Request Access Token w/ Basic Authentication

Some OAuth2 token endpoints want the Client ID/Client Secret to be included using HTTP Basic Authentication. For example, we can look at the documentation for the GoToMeeting API at You’ll see this under the “2 – Request Access Token”  in the GoTo API documentation linked above: curl -X POST “” \ -H “Authorization: Basic {Base64 Encoded consumerKey and consumerSecret}” […]

Start Browser from Client-Side PHP Script

Let’s say you have a PHP script (not PHP on a web server, but simply a .php script that you run from a command line), this is one way to start/launch a browser and automatically load/navigate to a URL. <?php // Type “start iexplore” and press “Enter” to open Internet Explorer and view its default home screen. // Alternatively, type […]

DNS Error: failed to get host address info, gai_error 8

If your MacOSX/iOS Swift application gets this error in the Chilkat LastErrorText: smtpSocketConnect: socket2Connect: connect2: connectImplicitSsl: connectSocket: connect_ipv6_or_ipv4: getAddressInfo: Failed to get host address info. (4) gai_error: 8 hostOrIpAddr: port: 465 –getAddressInfo getAddressInfo failed. –connect_ipv6_or_ipv4 –connectSocket –connectImplicitSsl ConnectFailReason: DNS lookup failed –connect2 –socket2Connect The solution is to enable the Outgoing Connections option in your Swift project.

Python Error: UnicodeEncodeError: ‘charmap’ codec can’t encode character

Question: I’ve discovered an error on your example ( ) as follows… AccountID: f1f489fb-9267-429e-a1dc-bc63a7c3f71e Traceback (most recent call last): File “M:\EXPORTIT\PY\”, line 50, in print(“Name: ” + xml.GetChildContent(“Accounts|Account[i]|Name”)) File “m:\Python\Python35-32\lib\encodings\”, line 19, in encode return codecs.charmap_encode(input,self.errors,encoding_map)[0] UnicodeEncodeError: ‘charmap’ codec can’t encode character ‘\u2013′ in position 20: character maps to It’s failing on the this line from the “”, Wages […]

O365 IMAP Authentication: OAuth and MFA Solution

There is much confusion and worry about Microsoft’s plans to disable standard password authentication for the IMAP, and POP3  protocols. Here is the announcement posted on 20-Sept-2019 on the Office 365 blog: Chilkat already supports OAuth2 for the IMAP, POP3, and SMTP protocols. (Microsoft will continue to support basic auth for SMTP)  In all three protocols, an application can […]

Chilkat v9.5.0.82 Release Notes

The next version release notes: Chilkat v9.5.0.83 Release NotesThe previous version release notes: Chilkat v9.5.0.80 Release Notes (Chilkat v9.5.0.81 was a hotfix specific to UWP (Universal Windows Platform) on NuGet.) Chilkat v9.5.0.82 Release Notes 1-Feb-2020 TLS 1.3:   TLS 1.3 can be optionally enabled by adding the “EnableTls13” keyword to the UncommonOptions property in various classes:  Socket, Http, Rest, Imap, MailMan, […]