We are using ASP.net and using System.Web.Mail namespace to send email from within our application. Every once in a while the recipients receive 2 or 3 copies of the same email. We are copying each email sent to a mailenable mail box and there are no duplicates in that mail box but the To: recipients receive multiple emails?
I am running ME on my Windows 2003 server. I am receiving 2 - 3 copies of every virus notification. I contacted Mail Enable to report the problem... when they replied, I got it 3 times.
I had a similar problem with attachments... The problem was that I had the Inbound Max Mail Delivery Time set to 0 hours which made it keep sending... That is in the properties of the MTA Manager... Once I set it to 1 everything was ok...