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Aspose smtpclinet gives Authentication unsuccessful error

Hi Aspose,

I am using latest version of Aspose.Email and trying to send the email with SMTP client, I am getting “Authentication unsuccessful” error.

Please find the attached aspose smtp log.

Aspose.Email.SMTP_2022-4-7.zip (4.2 KB)


We have logged this problem in our issue tracking system as EMAILNET-40570. We will inform you via this forum thread once there is an update available on it.

Could you please share sample application (source code without compilation errors) here for further investigation?


Please download full code example to use modern authentication with IMAP and SMTP clients.
EWSModernAuthenticationImapSmtp.zip (3.9 KB)