web
You’re offline. This is a read only version of the page.
close
Skip to main content

Notifications

Announcements

No record found.

News and Announcements icon
Community site session details

Community site session details

Session Id :
Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / E-mail error VXNlcm5hbWU6
Small and medium business | Business Central, N...
Suggested Answer

E-mail error VXNlcm5hbWU6

(0) ShareShare
ReportReport
Posted on by PPE 100

Hello

When applying the Office 365 settings to the SMTP mail settings in Business Central we are experiencing an error upon sending a test mail:

MailKit.Net.Smtp.SmtpClient.Authenticate failed with message VXNlcm5hbWU6

How can we read some more information on this error?

Thanks

I have the same question (0)
  • Suggested answer
    Marco Mels Profile Picture
    Marco Mels on at

    Hello,

    This is a base64 encoded string asking you for your username and password:

    www.ndchost.com/.../test-smtp-auth-telnet

    Or:

    github.com/.../686

    Do you have a screenshot of the SMTP server (please ensure you blur the mail address).

    Thanks.

Under review

Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.

Helpful resources

Quick Links

Responsible AI policies

As AI tools become more common, we’re introducing a Responsible AI Use…

Neeraj Kumar – Community Spotlight

We are honored to recognize Neeraj Kumar as our Community Spotlight honoree for…

Congratulations to the November Top 10 Community Leaders!

These are the community rock stars!

Leaderboard > Small and medium business | Business Central, NAV, RMS

#1
OussamaSabbouh Profile Picture

OussamaSabbouh 2,362

#2
YUN ZHU Profile Picture

YUN ZHU 867 Super User 2025 Season 2

#3
Sumit Singh Profile Picture

Sumit Singh 607

Last 30 days Overall leaderboard

Featured topics

Product updates

Dynamics 365 release plans