GitHub - lettier/smtpclient: A simple SMTP client that uses either port 25 or 587 with TLS authentication.
Cannot send secure mail thru System.Net.Mail.SmtpClient using Outlook365 Mail Server since February - Progress Community
GitHub - lettier/smtpclient: A simple SMTP client that uses either port 25 or 587 with TLS authentication.
![SMTP Client Supporting Implicit SSL Secure Sockets Layer with OAuth2 Open Authorization or Password Authorization (2.0) - CodeProject SMTP Client Supporting Implicit SSL Secure Sockets Layer with OAuth2 Open Authorization or Password Authorization (2.0) - CodeProject](https://www.codeproject.com/KB/IP/1173678/TestUziSecureSmtpClient.png)
SMTP Client Supporting Implicit SSL Secure Sockets Layer with OAuth2 Open Authorization or Password Authorization (2.0) - CodeProject
![Fix issues with printers, scanners, and LOB apps that send email using Microsoft 365 - Exchange | Microsoft Learn Fix issues with printers, scanners, and LOB apps that send email using Microsoft 365 - Exchange | Microsoft Learn](https://learn.microsoft.com/en-us/exchange/troubleshoot/exchangeonline/email-delivery/media/fix-issues-with-printers-scanners-and-lob-applications-that-send-email-using-off/multifunction-printer-connects%20to-m365.png)
Fix issues with printers, scanners, and LOB apps that send email using Microsoft 365 - Exchange | Microsoft Learn
![Office 365 Mailkit Secure Socket Issue · Issue #1 · cofoundry-cms/Cofoundry.Plugins.Mail.MailKit · GitHub Office 365 Mailkit Secure Socket Issue · Issue #1 · cofoundry-cms/Cofoundry.Plugins.Mail.MailKit · GitHub](https://user-images.githubusercontent.com/55808911/65711690-6e64e180-e063-11e9-8f64-0afe6ace0ecc.png)