I have an automated SQL task that sends an email using SMTP, to an Outlook group with 36 recipients. Most of the people get the email and can reply to it with no problem. Some do not get it. Testing has showed the common theme to be the email arrives with no FROM address, so it fails some 'bounce back' test and never gets into the network.
Anyone seen such a thing, or is this more likely to be happening in the SQL server?