Special Character on Password

[RichardKBR]

Describe the bug
Using a special character ¨ (umlaut) in password cause authentication error.

Platform:

• OS: Windows 11 Pro
• .NET Framework: 4.6.1
• MailKit Version: 2.15.0

Exception
Authentication Exception (535 5.7.3 Authentication unsuccessful)

To Reproduce
Steps to reproduce the behavior:

1. Put in youre test account password a character ¨ (umlaut)
2. Try to send email

[Jeffrey Stedfast]

Please upgrade. 2.15 is years out of date and there won't be any updates to 2.x

[RichardKBR]

Thx ill test!

[Jeffrey Stedfast]

Make sure to add this line of code to your program's startup logic:

System.Text.Encoding.RegisterProvider (System.Text.CodePagesEncodingProvider.Instance);

Then, when authenticating to your SMTP server, use the Authenticate() method that allows you to pass a System.Text.Encoding parameter to tell MailKit which encoding to use when encoding your password.