Hi Robert thank you for the answer , but i've already the same problem:

i used an existing SSL configuration on my portal, when i used the port 25 or 587 : i've "connection failed to amtp server" as postman error message

and when i used port 465 : i've "impossible to establish TCP/IP connection " as postman error message

ClassMethod SendMAil(mail As %Library.String, Url As %Library.String) As %Status
{

 Set server=##class(%Net.SMTP).%New()
 
  Set server.smtpserver="smtp.office365.com"
  //HotPOP SMTP server uses the default port (25)
  Set server.port=25
 
  //Create object to carry authentication

  Set auth=##class(%Net.Authenticator).%New()
  Set auth.UserName="noreply-service@*********.com"
  Set auth.Password="************"
 
  Set server.authenticator=auth
  Set server.AuthFrom=auth.UserName
 
 //create smtp server instance
 
 //generate mail body
 Set msg = ##class(%Net.MailMessage).%New()
 Set msg.From=server.authenticator.UserName
  Do msg.To.Insert(mail)
 Set msg.Subject="Set New Password"_$H
 Set msg.IsBinary=0
 Set msg.IsHTML=0
 Do msg.TextData.Write(Url)
 set status= server.Send(msg)
  If $$$ISERR(status) {
    Do $System.Status.DisplayError(status)
    Write server.Error
    
    Quit ""
  }
 
  Quit server.FailedSend
 

}

**********************************************************************

on my poste man i've this error: ERROR #6034 connetion failed to the SMTP server

thank you steve , it is what i need