Invalid error in Certificate

Question

In One Idm ,we are sending Mail to user .Recently we are getting an error like " 
 ErrorMessages = (2018-11-26 10:40:19.390) Executed on: server_default 
 [System.Security.Authentication.AuthenticationException] The remote certificate is invalid according to the validation procedure. 
 at StdioProcessor.StdioProcessor._Execute(Job job) 
 at VI.JobService.JobComponents.MailComponent.Activate(String task) 
 at VI.JobService.JobComponents.MailComponent._SendRichMail() 
 at VI.JobService.JobComponents.MailComponent._Send(MimeMessage message, MailSecurity security) 
 at VI.JobService.JobComponents.MailComponent._GetOrOpenSmtpConnection() 
 at MailKit.Net.Smtp.SmtpClient.Connect(String host, Int32 port, SecureSocketOptions options, CancellationToken cancellationToken). 
 
 We did not include SSL. But still we are getting this error. 
 
 Please guide me how to solve this.

Troy Grandy · Answer

If you are using version 8.x then I would suggest that you look at the following two configuration parameters to confirm that they are enabled: 
 Common\MailNotification\AcceptSelfSignedCert 
 Common\MailNotification\AllowServerNameMismatchInCert 
 
 Beginning with version 8 Identity Manager is more restrictive on certificates such as self signed and those that have a mismatch in the server name. If those are turned off then I kindly suggest to confirm that the send mail step in your process has those two parameters enabled see example below:

Endpoint Privilege Management

Invalid error in Certificate