While doing SMTP configuration, I am facing the below issue, Someone please help me on it
Logs:
"5661335","2022-10-06 18:27:18","Error","General","0","ErrorMessage","SourceCode.Workflow.Common.SmtpMail","0 SMTP mail send failure: Verify the SMTP connection strings are correct and that SMTP is working properly. Exception: Failure sending mail.","anonymous","0.0.0.0","LANT-V-Nintex:C:Program FilesK2Host ServerBin","5661335","a1317e94ef7b499d898b1c7d869654c7",""
"5661336","2022-10-06 18:27:18","Error","General","28083","ExtenderExecuteError","ProcessInstance.HandleException","28083 ServerEvent: There is no connection string for the destination email address ***************************
There is no connection string for the destination email address.
I assume that the K2 server is a member of an AD domain and the K2 Server service is running under some domain account.
Does this service account in AD have the same email address set in the mail attribute?
Does this service account in AD have the same email address set in the mail attribute?
- Nintex Employee
Hi @BilalAli
You will see that the exception is “Failure sending email” and this is returned from the SMTP server. I see from your connection strings that you are using SMTP O365. Microsoft has deprecated older protocols from connecting to Office 365 which means only TLS 1.2 is accepted: https://learn.microsoft.com/en-us/microsoft-365/compliance/prepare-tls-1.2-in-office-365?view=o365-worldwide
Would recommend you check whether TLS 1.2 is enabled on the server as per the KB: https://community.nintex.com/t5/Technical-Issues/K2-and-TLS-1-2-Support/ta-p/124200
You should only need to implement the “Minimum Requirements” registry settings, then do a reboot of the server for the changes to take effect.
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